UPSC Mains 2024 Anthropology Optional Question Papers with Model Answers

All 56 questions of the 2024 Civil Services Main Examination, Anthropology Paper I and Anthropology Paper II, with marks and a suggested time per part. Solve each part on paper first, then open the model answer, or send it to answer-writing practice for evaluation.

UPSC Mains 2024 Anthropology Paper I

Question 1 (50 marks)

Q1(a) · Culture and Society · 10 marks≈ 7 min
Concept and Characteristics of Culture and Civilization
Attributes of culture
हिंदी में प्रश्न
संस्कृति की विशेषताएँ
Practise this question Culture and Society notes
Model answer
Paper and question: Paper I, Q1(a)
Approach: A short note: open with Tylor's definition, then list the main attributes of culture, each with a brief Indian or world example, and conclude.
E.B. Tylor (1871) defined culture as 'that complex whole which includes knowledge, belief, art, morals, law, custom, and any other capabilities and habits acquired by man as a member of society'; its attributes follow from this.
Learned and shared: culture is acquired through enculturation (Herskovits), not genes; a child of any origin raised in a Santal village speaks Santali; a habit becomes culture only when a group shares it.
Symbolic and transmitted: Leslie White stressed symbolling, as in vermilion or the sacred thread; language transmits culture across generations, making it cumulative.
Integrated and adaptive: parts are linked, as the Toda buffalo, dairy and priesthood (Rivers, 1906); culture adapts people to environments, like the Inuit igloo.
Dynamic, universal yet unique: cultures change through invention, diffusion and acculturation; all societies share universals such as language and incest rules (Murdock), but each has its own content and pattern.
Q1(b) · Prehistoric Archaeology · 10 marks≈ 7 min
Neolithic, Chalcolithic, Bronze Age and Iron Age
Harappan maritime trade
हिंदी में प्रश्न
हड़प्पाकालीन समुद्री व्यापार
Practise this question Prehistoric Archaeology notes
Model answer
Paper and question: Paper I, Q1(b)
Approach: A short note on the evidence (ports, seals, boats, Mesopotamian texts), trade partners and goods, and its significance and decline.
The Harappan (Indus) civilisation of about 2600 to 1900 BCE conducted maritime trade along the Arabian Sea and the Persian Gulf with Oman (Magan), Bahrain (Dilmun) and Mesopotamia.
Ports and coastal sites: Lothal in Gujarat, excavated by S.R. Rao (1955–62), has a large brick basin he interpreted as a dockyard (some read it as a reservoir), a bead factory and a warehouse; Sutkagen-dor and Sotka-koh guarded the Makran coast.
Evidence: Akkadian texts of Sargon of Akkad (about 2300 BCE) mention ships from Meluhha, generally identified with the Indus region; Indus seals and etched carnelian beads occur at Ur and other Mesopotamian sites, a Persian Gulf seal was found at Lothal, and Harappan pottery occurs in Oman. A Mohenjo-daro seal depicts a boat, and Lothal yielded a terracotta boat model.
Exports included carnelian beads, ivory, timber and shell; imports included copper from Oman and possibly tin and silver, regulated by standard weights.
The trade declined after about 1900 BCE, contributing to the end of the mature Harappan cities.
Q1(c) · Kinship · 10 marks≈ 7 min
Kinship Terminology, Filiation, Descent and Alliance
Critical perspective on avoidance and joking relationship
हिंदी में प्रश्न
परिहार एवं परिहास संबंधों पर समालोचनात्मक दृष्टिकोण
Practise this question Kinship notes
Model answer
Paper and question: Paper I, Q1(c)
Approach: Define avoidance and joking relationships with examples, present Radcliffe-Brown's structural explanation, and then critique it with alternative views.
Avoidance restricts contact between certain kin, typically a man and his mother-in-law or, in north India, a woman and her husband's elder brother (jeth). The joking relationship, in Radcliffe-Brown's account (1940), is permitted or required disrespect, as between a woman and her husband's younger brother (devar) or between grandparents and grandchildren.
Tylor (1889) statistically linked mother-in-law avoidance to the husband living among his wife's kin. Radcliffe-Brown explained both customs as structural devices for relationships that combine attachment and separation, such as those between in-laws: avoidance expresses extreme respect, and joking turns potential hostility into play.
Critics call this functional explanation circular, since it cannot predict which tense relationship takes which form. Mary Douglas (1968) read jokes as attacks on the social structure, Freud saw avoidance as a defence against forbidden attraction, and others note that joking and avoidance depend on context.
Both are declining in urban nuclear families, yet they remain useful indicators of the structure of kinship relations.
Q1(d) · Human Genetics: Methods, Inheritance and Chromosomes · 10 marks≈ 7 min
Mendelian Genetics and Patterns of Inheritance in Man
Lethal and sublethal genes
हिंदी में प्रश्न
घातक और उपघातक जीन
Practise this question Human Genetics: Methods, Inheritance and Chromosomes notes
Model answer
Paper and question: Paper I, Q1(d)
Approach: Define lethal and sublethal genes, classify them (dominant, recessive, sublethal, subvital), give the classic and human examples, and note evolutionary significance.
Lethal genes cause the death of their carriers before reproductive age, usually before or soon after birth. Sublethal or semi-lethal genes kill fewer than all carriers (more than about half), while subvital genes merely reduce viability. Lucien Cuénot (1905) discovered the first lethal gene in yellow mice, where the homozygote dies and crosses give a 2:1 instead of 3:1 ratio.
Types: (i) dominant lethals kill even in heterozygotes and so appear only as fresh mutations; (ii) recessive lethals kill only homozygotes, as in Tay-Sachs disease and homozygous achondroplasia, whereas heterozygotes for achondroplasia survive as dwarfs; (iii) conditional lethals act only in certain environments, as G6PD-deficient people react to fava beans or some anti-malarial drugs.
Human sublethal examples, without modern treatment, include sickle-cell anaemia (HbSS), beta-thalassaemia major and Duchenne muscular dystrophy.
Such genes persist through recurrent mutation or heterozygote advantage, as with the sickle-cell gene and malaria, and their frequency rises with consanguinity.
Q1(e) · Population Genetics, Race and Human Variation · 10 marks≈ 7 min
Genetic Markers and Physiological Variation
Hemoglobin in health and disease
हिंदी में प्रश्न
स्वास्थ्य और बीमारी में हीमोग्लोबिन
Practise this question Population Genetics, Race and Human Variation notes
Model answer
Paper and question: Paper I, Q1(e)
Approach: Describe haemoglobin’s structure, types and genes and its normal role, then the haemoglobinopathies (structural variants and thalassaemias) with Indian distribution, and close with significance.
Haemoglobin is the iron-containing protein of red blood cells that carries oxygen from the lungs to tissues. It is a tetramer of four globin chains, each holding a haem group. Adult haemoglobin HbA is α2β2, HbA2 is α2δ2 (about 2.5 per cent), and foetal HbF (α2γ2), with higher oxygen affinity, predominates before birth.
Alpha-globin genes lie on chromosome 16 and the beta-globin cluster on chromosome 11; switching from gamma to beta chains after birth replaces HbF by HbA.
Disease: haemoglobinopathies are the commonest single-gene disorders worldwide. Structural variants include HbS (glutamic acid replaced by valine at position 6 of the beta chain), which makes red cells sickle and causes painful crises; HbE, very frequent in north-east India; HbD Punjab; and HbC in West Africa. Thalassaemias reduce production of alpha or beta chains, causing severe anaemia in beta-thalassaemia major.
HbS is common among tribes of central and western India, and carriers are protected against falciparum malaria. Screening, counselling and hydroxyurea treatment, under the 2023 sickle-cell mission, address this burden.

Question 2 (50 marks)

Q2(a) · Anthropological Theories · 20 marks≈ 14 min
Classical Evolutionism, Historical Particularism and Diffusionism
Discuss historical particularism as a critical development to the classical evolutionism.
हिंदी में प्रश्न
शास्त्रीय विकासवाद के आलोचनात्मक विकास के रूप में ऐतिहासिक विशिष्टतावाद पर चर्चा कीजिए।
Practise this question Anthropological Theories notes
Model answer
Paper and question: Paper I, Q2(a)
Approach: The question asks how Boas’s historical particularism grew out of a critique of classical evolutionism. Begin with the evolutionist premises, set out Boas’s objections point by point, then assess what was gained and lost.
Classical evolutionists such as Morgan (Ancient Society, 1877), Tylor and Frazer assumed the psychic unity of mankind, a single ladder of stages (savagery, barbarism, civilization) and a comparative method that ranked living peoples as survivals of earlier stages. Historical particularism, built by Franz Boas from the 1890s, was the first systematic attack on this scheme.
Critique of the comparative method: in his 1896 paper on the limitations of the comparative method, Boas argued that similar traits can arise from different causes (the principle of convergence), so masks or clans found in two places need not mark the same stage. Traits must be traced in their own history before being compared.
Each culture its own history: every culture is the product of a unique sequence of local development, diffusion and borrowing. His long fieldwork among the Kwakiutl of British Columbia showed complex cultures that fitted no stage.
Inductive fieldwork and relativism: Boas replaced armchair speculation with fieldwork in the native language, and texts recorded verbatim. He held that cultures must be judged by their own standards, which became cultural relativism under Herskovits. In The Mind of Primitive Man (1911) and his immigrant head-form study he separated race, language and culture, undermining racial rankings implicit in evolutionism.
Influence: his students Kroeber, Lowie, Sapir, Benedict and Mead extended the approach.
Assessment: the approach made anthropology empirical and anti-racist. Yet Marvin Harris (1968) criticised it as anti-theoretical empiricism, and by the 1940s White and Steward revived evolution in multilinear and energy-based forms. Particularism is best seen as a necessary corrective that cleared the ground for testable generalisation.
Q2(b) · Prehistoric Archaeology · 15 marks≈ 11 min
Neolithic, Chalcolithic, Bronze Age and Iron Age
Describe the evidences of food production and domestication of animals with special reference to Mehrgarh. Throw light on its significance.
हिंदी में प्रश्न
मेहरगढ़ के विशेष संदर्भ में खाद्य उत्पादन और पशुओं को पालतू बनाने के साक्ष्यों का वर्णन कीजिए। इसके महत्त्व पर प्रकाश डालिए।
Practise this question Prehistoric Archaeology notes
Model answer
Paper and question: Paper I, Q2(b)
Approach: Introduce Mehrgarh, describe the plant and animal evidence period by period, add associated features (houses, storage, burials, crafts), and then assess its significance for South Asian prehistory.
Mehrgarh, on the Bolan river at the edge of the Kachi plain in Baluchistan (Pakistan), was excavated by a French team under Jean-François Jarrige from 1974. Its occupation, from about 7000 BCE to about 2500 BCE, makes it the earliest known farming village of South Asia.
Plant evidence: in the aceramic Neolithic (Period I, about 7000 to 5500 BCE), grain impressions in mud bricks and charred seeds show cultivation dominated by barley, with einkorn, emmer and durum-type wheat; sickle blades hafted with bitumen show harvesting. Cotton seeds appear in Period II.
Animal evidence: Richard Meadow's faunal study showed that early levels are dominated by wild gazelle, swamp deer, nilgai, wild sheep, goat and cattle, but by the end of Period I domestic goat, sheep and humped zebu cattle prevail. The steady decrease in cattle size points to local domestication of zebu. Young goats were buried with some of the dead.
Other features: multi-roomed mud-brick houses and compartmented storage buildings, burials with turquoise, lapis lazuli and marine shell (showing long-distance exchange), and drilled molar teeth (about 9,000 to 7,500 years old) suggesting early dentistry.
Significance: Mehrgarh pushed South Asian farming back to the seventh millennium BCE, showed that food production developed locally with regional animals rather than arriving late by diffusion, and documents unbroken growth from village to the threshold of the Harappan civilisation.
Q2(c) · Ecological Anthropology, Epidemiology and Human Growth · 15 marks≈ 11 min
Epidemiological Anthropology
Critically comment on the lifestyle diseases and their impact on human health.
हिंदी में प्रश्न
जीवन-शैली से जुड़ी बीमारियों और मानव स्वास्थ्य पर उनके प्रभाव पर आलोचनात्मक टिप्पणी कीजिए।
Practise this question Ecological Anthropology, Epidemiology and Human Growth notes
Model answer
Paper and question: Paper I, Q2(c)
Approach: Define lifestyle diseases, give their burden with data, explain causes and impact (individual, economic, social), then critically comment on the term and the structural and evolutionary explanations, ending with responses.
Lifestyle diseases are non-communicable diseases (NCDs) linked to diet, physical inactivity, tobacco, alcohol and stress: cardiovascular disease, type 2 diabetes, hypertension, obesity, many cancers and chronic respiratory disease. WHO estimates that NCDs cause about 74 per cent of deaths worldwide.
India: the ICMR-INDIAB study (2023) reported diabetes in 11.4 per cent of adults, pre-diabetes in 15.3 per cent and hypertension in 35.5 per cent; NCDs now account for well over half of all deaths. Impacts include early heart attacks among young adults, disability, catastrophic health spending, loss of productivity and a double burden alongside infections.
Critical comment: (i) the label lifestyle blames individual choice, while poverty, urban design, commercial marketing of processed food and work stress shape behaviour; (ii) evolutionary mismatch theory explains vulnerability: James Neel’s thrifty genotype (1962) and Barker’s thrifty phenotype suggest bodies adapted to scarcity now face abundance, which may help explain high diabetes among South Asians and among tribal groups undergoing rapid dietary transition; (iii) Barry Popkin’s nutrition transition links rising NCDs to cheap fats and sugars.
Responses include the National Programme for Prevention and Control of NCDs, the Fit India Movement (2019), Eat Right India (2018), tobacco control and healthy urban planning. A balanced view combines individual behaviour change with structural reform.

Question 3 (50 marks)

Q3(a) · Human Genetics: Methods, Inheritance and Chromosomes · 20 marks≈ 14 min
Chromosomes and Chromosomal Aberrations
What is meant by karyotype? How does its analysis help in diagnosis of the chromosomal aberrations in man?
हिंदी में प्रश्न
गुणसूत्री-रचना से आपका क्या तात्पर्य है? इसका विश्लेषण मनुष्य में गुणसूत्र विपथन के निदान में किस प्रकार सहायता करता है?
Practise this question Human Genetics: Methods, Inheritance and Chromosomes notes
Model answer
Paper and question: Paper I, Q3(a)
Approach: Define karyotype, describe how it is prepared and read (culture, arrest, banding, Denver groups, ISCN notation), then explain its diagnostic uses for numerical and structural aberrations, prenatal and cancer diagnosis, newer molecular methods and limits; draw a karyotype.
A karyotype is the complete chromosome complement of a cell, displayed as homologous pairs arranged by size, centromere position and banding pattern. The normal human karyotype, 46,XX or 46,XY, was established by Tjio and Levan in 1956.
Preparation: peripheral blood lymphocytes are cultured with phytohaemagglutinin to stimulate division; colchicine arrests cells at metaphase, when chromosomes are most condensed; a hypotonic solution swells the cells, which are fixed, spread on slides and stained, most often with Giemsa (G-banding), giving each chromosome a characteristic band pattern. The chromosomes are photographed, cut out or arranged digitally and grouped by the Denver system (1960) into groups A to G, with the sex chromosomes separate. Results are written in the International System for Human Cytogenomic Nomenclature, for example 47,XY,+21.
Diagnosis of numerical aberrations: trisomies such as Down (47,+21, first shown by Lejeune in 1959), Edwards (+18) and Patau (+13), and sex-chromosome conditions such as Turner (45,X) and Klinefelter (47,XXY), including mosaics.
Diagnosis of structural aberrations: deletions such as cri-du-chat (5p−), duplications, inversions, ring chromosomes and translocations, including the Robertsonian translocation behind familial Down syndrome and the Philadelphia chromosome, t(9;22), in chronic myeloid leukaemia.
Applications: prenatal diagnosis from amniotic fluid or chorionic villi, investigation of recurrent miscarriage, infertility, ambiguous genitalia, developmental delay and cancer. Fluorescence in situ hybridisation (FISH), spectral karyotyping and chromosomal microarray detect smaller changes, such as the 22q11.2 microdeletion of DiGeorge syndrome, that light microscopy misses.
Limits: conventional karyotyping cannot detect changes smaller than about 5 to 10 megabases or single-gene mutations. Still, it remains the basic test for chromosomal disorders.
Diagram: a G-banded karyotype grid of 22 autosome pairs in Denver groups A to G plus XX or XY, with an extra chromosome 21 marked for Down syndrome.
Q3(b) · Family · 15 marks≈ 11 min
Family and Social Change
Define urbanization and discuss its impact on family in India with examples.
हिंदी में प्रश्न
शहरीकरण को परिभाषित कीजिए तथा भारत में परिवार पर इसके प्रभाव की सोदाहरण विवेचना कीजिए।
Practise this question Family notes
Model answer
Paper and question: Paper I, Q3(b)
Approach: Define urbanization (with Wirth and the Census figure), then discuss its impact on the structure, roles and marriage of the Indian family, the evidence of persistence, and the problems created.
Urbanization is the growth in the share of population living in towns and cities and the spread of urban ways of life. Louis Wirth (1938) saw urbanism, marked by size, density and heterogeneity, as weakening kinship; India was 31.1% urban in Census 2011.
Structure: flats and wage jobs favour small, neolocal nuclear households, and migrants from Bihar or Odisha live far from their parents.
Roles: women's education and employment create dual-earner couples, weaken elders' authority and give wives more say, as in the symmetrical family of Young and Willmott.
Marriage: later marriage, fewer children, more inter-caste and love-cum-arranged marriages through matrimonial websites, and more divorce.
Persistence: Kapadia (1955) found joint-family sentiment in nuclear households, and Milton Singer (1968) found Madras industrialists running firms through joint families. Litwak's modified extended family appears in remittances, festival visits and care of parents.
Problems: lonely elderly (hence the Maintenance and Welfare of Parents and Senior Citizens Act, 2007), childcare stress and split households of tribal migrants such as Santal labourers.
Urbanization has changed the form of the Indian family more than its values, as Patricia Uberoi notes: adaptation, not breakdown.
Q3(c) · Culture, Communication and Research Methods · 15 marks≈ 11 min
Fieldwork Tradition, Technique, Method and Methodology
Discuss the contemporary challenges in fieldwork method in anthropological research.
हिंदी में प्रश्न
मानवशास्त्रीय अनुसंधान में क्षेत्रीय कार्य-पद्धति में समकालीन चुनौतियों की विवेचना कीजिए।
Practise this question Culture, Communication and Research Methods notes
Model answer
Paper and question: Paper I, Q3(c)
Approach: Identify the main contemporary challenges (access and permissions, ethics and consent, changing and mobile fields, digital fields, safety, insider-outsider and representation, time and funding), each with an example, and suggest responses.
Classical fieldwork assumed a lone researcher living for a year or more in a small, bounded community. Contemporary conditions challenge almost every element of that model.
Access and permission: research among PVTGs such as the Jarawa, Shompen or Sentinelese is restricted under the Andaman and Nicobar Protection of Aboriginal Tribes Regulation (1956), and conflict areas in central India need security clearance. Communities themselves may refuse researchers after past exploitation.
Ethics and consent: ethics committee approval, written consent and data protection (the Digital Personal Data Protection Act 2023) are now required, and genetic and health sampling raises questions of benefit-sharing.
Changing fields: migration, urbanisation and globalisation mean that communities are dispersed; multi-sited and digital ethnography of WhatsApp groups, social media and online communities need new skills. The COVID-19 pandemic forced remote interviews and exposed their limits.
Positionality and representation: native and insider anthropologists face role conflict, outsiders face suspicion, and communities now contest how they are represented; reflexivity and collaborative writing respond to this.
Practical limits: shorter funded projects, safety risks, and research fatigue in much-studied villages. Mixed methods, team research, community partnerships and ethical reflexivity are the main responses.

Question 4 (50 marks)

Q4(a) · Anthropological Theories · 20 marks≈ 14 min
Culture and Personality, Neo-evolutionism and Later Theories
Critically discuss the characteristics of the psychological types in the cultures of the American South-West as observed by Ruth Benedict.
हिंदी में प्रश्न
रुथ बेनेडिक्ट द्वारा देखी गई अमरीका की दक्षिण-पश्चिम की संस्कृतियों में मनोवैज्ञानिक प्रकारों की विशेषताओं पर समालोचनात्मक चर्चा कीजिए।
Practise this question Anthropological Theories notes
Model answer
Paper and question: Paper I, Q4(a)
Approach: Explain Benedict’s configurational approach and the Apollonian–Dionysian contrast between the Pueblo (Zuni) and other Native American cultures, with concrete traits, then critically evaluate with later fieldwork.
Ruth Benedict, a student of Boas, argued in Patterns of Culture (1934) that each culture selects a few traits from the “great arc” of human possibilities and integrates them into a dominant configuration, so that a culture is like personality writ large. Borrowing Nietzsche’s terms, she described the Pueblo of the American South-West as Apollonian and most other North American Indians, especially of the Plains, as Dionysian.
Apollonian Zuni: the Zuni valued sobriety, moderation and the middle way. Ritual was formal, collective and exactly repeated by priesthoods and masked kachina dancers; individual visions, drugs, alcohol and self-torture were avoided. Leaders were reluctant, an ideal person was mild and cooperative, competition and display were disapproved, and marriage and divorce were quiet affairs. Rain and fertility were sought through orderly ceremony, not ecstasy.
Dionysian neighbours: Plains peoples sought the vision through fasting, self-torture and isolation, valued excess, personal boasting and frenzy, and some groups used peyote; the Kwakiutl and Dobu cases in the same book illustrated megalomaniac rivalry and suspicion.
Critique: Li An-che (1937) and later ethnographers showed that Zuni life also had whipping of children at initiation, factional quarrels, witchcraft accusations and anxiety, so the Apollonian picture was selective. John Bennett (1946) noted that the same data could yield an “organic” or a “repressive” view. Critics also faulted her for treating cultures as homogeneous, for literary rather than measurable labels, and for little attention to history and individual variation, though she did discuss deviants.
Despite these flaws, Benedict’s idea of cultural integration and of normality as culturally defined founded the configurational approach and gave a strong argument for cultural relativism.
Q4(b) · Prehistoric Archaeology · 15 marks≈ 11 min
Palaeolithic and Mesolithic Cultures
Discuss the Acheulian and Oldowan traditions of Indian Paleolithic cultures with suitable illustrations.
हिंदी में प्रश्न
उपयुक्त उदाहरणों के साथ भारतीय पुरापाषाणिक संस्कृतियों की एश्यूलियन और ओल्डोवन परंपराओं की चर्चा कीजिए।
Practise this question Prehistoric Archaeology notes
Model answer
Paper and question: Paper I, Q4(b)
Approach: Define the two traditions, show how the Oldowan (pebble-tool) element appears in India through the Soanian and early sites, then describe the Indian Acheulian with dated sites, and illustrate a chopper, handaxe and cleaver.
The Oldowan, named by Louis and Mary Leakey after Olduvai Gorge, is the earliest widespread stone industry (from about 2.6 million years) of simple choppers and sharp flakes; the Acheulian, named after Saint-Acheul in France, is marked by bifacial handaxes and cleavers, from about 1.76 million years, made mainly by Homo erectus.
Oldowan-like tradition in India: no classic Oldowan sequence is established. Pebble-tool assemblages of choppers and chopping tools form the Soanian of the Siwaliks and Potwar, and similar pebble tools occur in early levels of peninsular sites. Very early claims at Riwat and Masol are debated.
Indian Acheulian: found across most of the subcontinent except the humid north-east and Kerala. Attirampakkam (Tamil Nadu) is dated to about 1.5 million years (Shanti Pappu and team, 2011); Isampur (Karnataka), a quarry-cum-workshop, to about 1.2 million years by ESR; other sites include Hunsgi (K. Paddayya, limestone tools), Bhimbetka, Didwana, Chirki-Nevasa, the Belan valley and Hathnora, which gave the Narmada hominin.
Indian Acheulian handaxes and cleavers are mostly of quartzite, often made on large flakes; the abundance of cleavers is a distinctive feature. Early Acheulian tools are thick and irregular; late ones are thin, symmetrical and soft-hammer finished.
Diagram: a chopper (pebble flaked on one face to a wavy edge), a pear-shaped handaxe flaked on both faces with tip and butt marked, and a cleaver with a broad straight cutting edge.
India thus shows a strong, early Acheulian rather than a separate Oldowan stage.
Q4(c) · Reproductive Biology, Demography and Applied Anthropology · 15 marks≈ 11 min
Applications of Anthropology
What is genetic counselling? Briefly discuss various steps involved in it.
हिंदी में प्रश्न
आनुवंशिक परामर्श क्या है? इसमें सम्मिलित विभिन्न चरणों की संक्षेप में चर्चा कीजिए।
Practise this question Reproductive Biology, Demography and Applied Anthropology notes
Model answer
Paper and question: Paper I, Q4(c)
Approach: Define genetic counselling with its aim, then explain its steps in sequence, with an Indian example such as sickle-cell or thalassaemia counselling.
Genetic counselling, a term coined by Sheldon Reed in 1947, is a communication process that helps individuals and families understand the medical, psychological and family implications of a genetic disorder or its risk, and make informed decisions. Its guiding principle is non-directiveness: the counsellor informs, the family decides.
Steps: (1) referral and intake, recording the reason, such as an affected child, recurrent miscarriage, advanced maternal age or consanguinity; (2) family history and a three-generation pedigree; (3) diagnosis by clinical examination and tests such as haemoglobin electrophoresis, karyotyping or DNA analysis; (4) risk assessment, using Mendelian ratios (for example one in four for two carriers of an autosomal recessive disorder) or empirical risks; (5) communication of the diagnosis, prognosis and risk in simple language; (6) discussion of options, carrier testing of relatives, prenatal diagnosis by chorionic villus sampling or amniocentesis, preimplantation genetic testing, gamete donation or adoption; (7) support for the decision and follow-up, including psychological support.
Diagram: a three-generation pedigree with two carrier parents (half-shaded symbols) and one affected child (fully shaded).
In India, the National Sickle Cell Anaemia Elimination Mission (launched 2023 at Shahdol) issues genetic status cards and counsels tribal youth before marriage, while thalassaemia carrier screening shows how counselling can reduce affected births. Counselling must respect cultural values and avoid coercion and stigma.

Question 5 (50 marks)

Q5(a) · Prehistoric Archaeology · 10 marks≈ 7 min
Principles of Prehistoric Archaeology and Dating Methods
Chronometric dating
हिंदी में प्रश्न
कालानुक्रमिक आयु-निर्धारण
Practise this question Prehistoric Archaeology notes
Model answer
Paper and question: Paper I, Q5(a)
Approach: Define chronometric dating against relative dating, classify the main methods by principle with range and material, and conclude on cross-checking.
Chronometric (absolute) dating gives an age in calendar years or years before present (BP, present fixed at 1950), with an error range, unlike relative dating, which only orders events as older or younger.
Annual cycles: dendrochronology (A.E. Douglass) counts tree rings and is accurate to the year over about 12,000 years; varve analysis (Gerard De Geer) counts yearly lake layers.
Radioactive decay: radiocarbon (Willard Libby, 1949; half-life about 5,730 years) dates organic material up to about 50,000 years; potassium-argon and argon-argon date volcanic rock from about 100,000 years upwards, as at Olduvai; uranium-series dates cave calcite and coral up to about 500,000 years; fission track dates volcanic glass and zircon.
Trapped charge: thermoluminescence (pottery, burnt flint), OSL (sediments) and electron spin resonance (tooth enamel) measure radiation dose accumulated since heating, light exposure or burial.
Others: archaeomagnetism, obsidian hydration and cosmogenic burial dating, which dated the Attirampakkam Acheulian to about 1.5 million years (2011).
Each method suits particular materials and time ranges, so the best chronologies combine several methods with stratigraphy.
Q5(b) · Economic Organisation · 10 marks≈ 7 min
Production, Distribution and Exchange
Cultural relevance of the Kula
हिंदी में प्रश्न
कूला की सांस्कृतिक प्रासंगिकता
Practise this question Economic Organisation notes
Model answer
Paper and question: Paper I, Q5(b)
Approach: Describe the kula briefly with Malinowski, then bring out its cultural meanings: prestige, alliance, trade, magic and myth, and gender, with later restudies.
The kula, described by Bronislaw Malinowski in Argonauts of the Western Pacific (1922), is a ceremonial exchange among the Massim islands in which red shell necklaces (soulava) travel clockwise and white shell armbands (mwali) anticlockwise between lifelong partners.
Prestige and renown: the valuables have no practical use and are passed on after a while; fame comes from handling famous named pieces, so the kula expresses honour rather than profit.
Alliance and peace: partnerships link people of different islands and give them safe passage; J.P.S. Uberoi (1962) read the kula as a political system among stateless communities. Under its cover, ordinary goods are bartered (gimwali), so it also frames trade.
Ritual and myth: canoe-building, voyages and exchanges are accompanied by magic and myth, and Marcel Mauss treated such exchange as a total social phenomenon, at once economic, legal, religious and moral.
Wider meaning: the kula refuted the idea of a universal economic man, and restudies such as The Kula (1983), edited by Jerry and Edmund Leach, show it persisting and changing.
Q5(c) · Human Genetics: Methods, Inheritance and Chromosomes · 10 marks≈ 7 min
Methods of Studying Human Genetics
Heritability and its estimation
हिंदी में प्रश्न
वंशागतित्व और इसका अनुमान
Practise this question Human Genetics: Methods, Inheritance and Chromosomes notes
Model answer
Paper and question: Paper I, Q5(c)
Approach: Define heritability (broad and narrow), give the methods of estimation with formulas, examples of values, and cautions in interpretation.
Heritability is the proportion of the total phenotypic variance of a trait in a population that is due to genetic differences. Broad-sense heritability (H²) is genetic variance divided by phenotypic variance (VG/VP); narrow-sense heritability (h²) is additive genetic variance divided by phenotypic variance (VA/VP), which predicts response to selection.
Estimation: (i) twin studies: comparing correlations of identical and fraternal twins, Falconer’s formula h² = 2(rMZ − rDZ), or Holzinger’s H = (rMZ − rDZ)/(1 − rDZ); (ii) parent-offspring regression, where the slope of offspring on mid-parent values estimates h²; (iii) sibling and half-sib correlations; (iv) adoption studies; (v) today, genome-wide SNP data.
Examples: stature and fingerprint total ridge count show high heritability (around 0.8 to 0.9), while traits such as IQ give moderate and debated values.
Cautions: heritability applies to a population in a given environment, not to individuals; a high value does not mean a trait cannot be changed by environment, as rising stature with better nutrition shows.
Q5(d) · Political Organisation and Social Control · 10 marks≈ 7 min
Band, Tribe, Chiefdom, Kingdom and State
Authority and forms of political organization
हिंदी में प्रश्न
राजनीतिक संगठन के प्राधिकार और स्वरूप
Practise this question Political Organisation and Social Control notes
Model answer
Paper and question: Paper I, Q5(d)
Approach: A short note: define authority with Weber, then show how its form and basis change across band, tribe, chiefdom and state, with one example each.
Authority is power accepted as legitimate; Max Weber classed it as traditional, charismatic and legal-rational. Its form changes with the type of political organisation (Service's band, tribe, chiefdom and state).
Band: there is influence rather than authority; a skilled hunter or elder leads by persuasion and consensus, as among the Inuit, !Kung and Birhor.
Tribe: authority is shared by elders, lineage heads and councils, or won by generosity, as by the Melanesian big man; the Nuer leopard-skin chief only mediates feuds, while the Santal manjhi presides over the village council.
Chiefdom: authority becomes hereditary, ranked and sacred, as in Polynesian chiefs with mana and the Konyak Naga Ang, and rests on redistribution of tribute.
State: authority is legal-rational and backed by the monopoly of legitimate force (Weber), with bureaucracy, courts and taxation.
The shift is from personal to office-based authority, but real systems mix types, as tribal headmen now coexist with elected panchayats under PESA (1996).
Q5(e) · Human Genetics: Methods, Inheritance and Chromosomes · 10 marks≈ 7 min
Mendelian Genetics and Patterns of Inheritance in Man
Single-gene mutation disorders in man
हिंदी में प्रश्न
मनुष्य में एकल-जीन उत्परिवर्तन विकार
Practise this question Human Genetics: Methods, Inheritance and Chromosomes notes
Model answer
Paper and question: Paper I, Q5(e)
Approach: Define single-gene (monogenic) disorders, classify by mode of inheritance with examples and mechanisms, note their Indian relevance, and close with prevention.
Single-gene disorders result from a mutation in one gene and follow Mendelian patterns of inheritance. Thousands are catalogued in Online Mendelian Inheritance in Man (OMIM).
Types: (i) autosomal dominant: Huntington disease (CAG repeat expansion on chromosome 4), Marfan syndrome, achondroplasia and familial hypercholesterolaemia; (ii) autosomal recessive: sickle-cell anaemia (a point mutation replacing glutamic acid by valine in beta-globin), beta-thalassaemia, cystic fibrosis, phenylketonuria and albinism; (iii) X-linked recessive: haemophilia A and B, Duchenne muscular dystrophy, G6PD deficiency and red-green colour blindness; (iv) X-linked dominant: hypophosphataemic rickets; (v) mitochondrial: Leber hereditary optic neuropathy.
India: sickle-cell disease is concentrated among tribal communities of central and western India, and beta-thalassaemia carriers form roughly 3 to 4 per cent of the population; the National Sickle Cell Anaemia Elimination Mission (2023) aims at screening and elimination by 2047.
Prevention relies on carrier screening, genetic counselling, newborn screening and prenatal diagnosis.

Question 6 (50 marks)

Q6(a) · Fossil Hominids · 20 marks≈ 14 min
Homo erectus
Discuss the geographical distribution of Homo erectus. Taking into account its physical features, where does it fit in human evolutionary line?
हिंदी में प्रश्न
होमो इरेक्टस के भौगोलिक वितरण की विवेचना कीजिए। इसकी भौतिक विशेषताओं के दृष्टिगत, मानव विकासक्रम रेखा में इसका उपयुक्त स्थान कहाँ होगा?
Practise this question Fossil Hominids notes
Model answer
Paper and question: Paper I, Q6(a)
Approach: Two demands: the distribution of Homo erectus region by region, and, from its physical features, its place in the human line; draw a world distribution map and end with the ancestor-versus-side-branch debate.
Homo erectus, first named by Eugène Dubois as Pithecanthropus erectus (1894), was the first hominin to live outside Africa, from about 1.9 million to about 110,000 years ago.
Africa: KNM-ER 3733 (Koobi Fora, about 1.78 million years), the Turkana Boy (Nariokotome, 1984, about 1.5 million years), OH 9 (Olduvai) and Ternifine (Algeria); many call the early African forms Homo ergaster.
Asia: Dmanisi in Georgia (about 1.85 to 1.77 million years, the oldest outside Africa); Java Man from Trinil (Dubois, 1891), Sangiran (von Koenigswald) and the late Ngandong skulls (about 117,000 to 108,000 years); Peking Man from Zhoukoudian (Davidson Black, 1927; about 780,000 to 400,000 years) in China; the Narmada cranium from Hathnora (Arun Sonakia, 1982), first called H. erectus narmadensis, is now usually seen as archaic H. sapiens.
Europe: the Mauer jaw (1907), called H. erectus heidelbergensis in the syllabus, is now usually placed in Homo heidelbergensis.
Diagram: world map marking Koobi Fora, Nariokotome, Olduvai, Ternifine, Dmanisi, Hathnora, Zhoukoudian, Trinil, Sangiran and Ngandong, with an arrow out of Africa about 1.85 million years ago.
Physical features: long, low, thick-walled skull with a continuous brow ridge, sagittal keel, angular occipital torus and widest point near the base; no chin; brain about 750 to 1,250 cc; smaller teeth than H. habilis; a tall, essentially modern body built for long-distance walking.
Position in the line: these features are intermediate between H. habilis and later humans, so African H. erectus (or ergaster) is widely regarded as ancestral to H. heidelbergensis and through it to Neanderthals and H. sapiens; late Javanese and Chinese populations were probably a regional branch that died out.
Multiregionalists (Weidenreich; Wolpoff, Thorne and Wu Xinzhi, 1984) linked Peking Man to modern East Asians, but genetics favours a recent African origin, so H. erectus is best seen as a stem species with an extinct Asian offshoot.
Q6(b) · Reproductive Biology, Demography and Applied Anthropology · 15 marks≈ 11 min
Applications of Anthropology
Discuss the applications of forensic anthropology with suitable examples.
हिंदी में प्रश्न
उपयुक्त उदाहरणों के साथ फोरेंसिक मानव-विज्ञान के अनुप्रयोगों पर चर्चा कीजिए।
Practise this question Reproductive Biology, Demography and Applied Anthropology notes
Model answer
Paper and question: Paper I, Q6(b)
Approach: Define forensic anthropology and give its range of applications, each with an example from India or abroad, ending with limitations.
Forensic anthropology is the application of physical anthropology, especially skeletal biology, to questions of law; Wilton Krogman's The Human Skeleton in Forensic Medicine (1962) laid its foundation.
Identification of the dead: estimating sex, age, stature and ancestry from skeletons and matching them with missing persons, supported by DNA, as in the identification of victims of the 2004 tsunami and the 2013 Kedarnath floods. Trauma analysis: distinguishing ante-mortem, peri-mortem and post-mortem injuries and weapon type.
Facial reconstruction and superimposition: in the Buck Ruxton case (1935) Glaister and Brash superimposed a skull on a portrait of Isabella Ruxton. Identification of the living: fingerprints (the Henry system, developed in Bengal and used in Calcutta from 1897), age estimation of juveniles and of persons without birth records, and biometric systems like Aadhaar's fingerprints and iris scans.
Mass graves and human rights: Clyde Snow's work in Argentina from 1984 identified victims of the military regime. Historical and archaeological cases: ancient DNA showed the Roopkund skeletons came from distinct groups about a thousand years apart (2019), and DNA and isotopes linked the Ajnala well skeletons to 1857 sepoys from the Gangetic plain (2022). Paternity and disputed identity are also settled with DNA.
Its limits are Western reference standards that misfit Indian populations and too few trained forensic anthropologists; the National Forensic Sciences University (2020) is a step to fill this gap.
Q6(c) · Anthropological Theories · 15 marks≈ 11 min
Functionalism, Structural-Functionalism and Structuralism
How does Lévi-Strauss look at the Tsimshian myth of Asdiwal? Critically discuss Lévi-Strauss' theory of structuralism in the light of his study of mythologies.
हिंदी में प्रश्न
लेवी-स्ट्रॉस सिम्शी आस्दीवाल मिथक को कैसे देखते हैं? मिथकों के अध्ययन की रोशनी में लेवी-स्ट्रॉस के संरचनावाद के सिद्धान्त की आलोचनात्मक विवेचना कीजिए।
Practise this question Anthropological Theories notes
Model answer
Paper and question: Paper I, Q6(c)
Approach: Two parts: summarise Lévi-Strauss’s analysis of the Asdiwal myth (levels, oppositions, mediation of the residence contradiction), then critically assess his structural theory of myth using Mythologiques and its critics.
In “The Story of Asdiwal” (1958) Lévi-Strauss analysed a myth of the Tsimshian of the North-West Coast to show that a myth is a logical tool for working on contradictions in social life.
Analysis: the story follows the hero Asdiwal, born of a widow and a supernatural being, through journeys east and west, up to the sky and down to the underworld, and between mountain hunting and sea hunting. Lévi-Strauss read it on four levels, geographic, techno-economic, sociological and cosmological, each built on binary oppositions (high/low, land/water, east/west).
At the sociological level the myth works on a real tension: Tsimshian descent is matrilineal, but residence after marriage is patrilocal. Asdiwal tries matrilocal and patrilocal residence in turn, and every arrangement fails; he ends turned to stone on a mountain. The myth thus states that no residence rule resolves the contradiction, a negative form of mediation.
Theory: in Mythologiques (four volumes, 1964–1971) he treated hundreds of American myths as transformations of one another, holding that myths think themselves in men without their awareness; the meaning lies in relations, not in single elements.
Critique: Mary Douglas (1967) and Leach praised the insight but found the oppositions partly read in by the analyst and impossible to verify. The theory remains valuable as a method of finding hidden logic in myth, if checked against ethnographic context.

Question 7 (50 marks)

Q7(a) · Anthropological Theories · 20 marks≈ 14 min
Culture and Personality, Neo-evolutionism and Later Theories
Critically explain the notion of 'deconstruction' in the light of the postmodern works of Jacques Derrida.
हिंदी में प्रश्न
ज़ाक् डेरीडा के उत्तर-आधुनिकतावादी कार्यों के आलोक में 'विखंडन' की धारणा की आलोचनात्मक व्याख्या कीजिए।
Practise this question Anthropological Theories notes
Model answer
Paper and question: Paper I, Q7(a)
Approach: Define deconstruction from Derrida’s works, explain its key moves (logocentrism, binary hierarchy, différance, supplement), show its use in anthropology including Derrida’s reading of Lévi-Strauss, then evaluate critically.
Deconstruction is the strategy of reading developed by the French philosopher Jacques Derrida in Of Grammatology (1967) and the lecture “Structure, Sign and Play” (1966). It shows that texts and concepts rest on hidden hierarchies and contradictions that undo their own claims to fixed meaning.
Key ideas: (i) Western thought is logocentric: it assumes a fixed centre of truth or presence and privileges speech over writing. (ii) Concepts are organised as binary pairs (speech/writing, nature/culture, male/female, civilised/primitive) in which one term is privileged; deconstruction reverses and then displaces the hierarchy. (iii) Meaning is never fully present: Derrida’s différance combines differing and deferring, since each sign points endlessly to other signs. (iv) The supplement, apparently secondary, turns out to be necessary to the primary term. His remark that there is nothing outside the text means that all meaning is interpretive.
In anthropology: Derrida deconstructed Lévi-Strauss’s “A Writing Lesson” in Tristes Tropiques, where the Nambikwara were described as a people without writing whose innocence was corrupted by it. Derrida argued that the Nambikwara already had forms of differentiation and violence, and that the opposition between innocent oral societies and writing societies was a romantic, ethnocentric binary.
Influence: Writing Culture (1986) and the reflexive turn treated ethnographies as constructed texts; scholars deconstructed categories such as tribe, caste, primitive and the West/rest divide.
Critique: critics call deconstruction obscure, endlessly relativist and politically paralysing, since if every reading is unstable it is hard to defend evidence or rights; John Searle debated Derrida on these grounds.
Deconstruction is best used as a critical tool to expose hidden assumptions in ethnographic writing and official categories, not as a substitute for fieldwork and evidence.
Q7(b) · Human Genetics: Methods, Inheritance and Chromosomes · 15 marks≈ 11 min
Mendelian Genetics and Patterns of Inheritance in Man
What is a multifactorial trait? Illustrate your answer with suitable human examples.
हिंदी में प्रश्न
बहुघटकीय विशेषक क्या है? अपने उत्तर को उपयुक्त मानवीय उदाहरणों से स्पष्ट कीजिए।
Practise this question Human Genetics: Methods, Inheritance and Chromosomes notes
Model answer
Paper and question: Paper I, Q7(b)
Approach: Define a multifactorial trait, explain the threshold model and its characteristics, illustrate with continuous and discontinuous human examples, and conclude.
A multifactorial trait is one determined by many genes, each of small additive effect, interacting with environmental factors. Unlike single-gene traits, it does not show Mendelian ratios; it clusters in families but with lower recurrence risks.
Continuous traits: stature, weight, skin colour, blood pressure and intelligence vary in a normal (bell-shaped) distribution. Stature has high heritability but has risen in many populations, including India, with better nutrition, showing the environmental share.
Discontinuous traits and the threshold model: some disorders are either present or absent, yet are multifactorial. D.S. Falconer (1965) proposed that an underlying liability is normally distributed and the disorder appears only when liability crosses a threshold. Examples are cleft lip and palate, neural tube defects (influenced by maternal folate), congenital heart defects, pyloric stenosis, type 2 diabetes, coronary heart disease and schizophrenia.
Characteristics: risk is highest for first-degree relatives and falls sharply for distant ones; it rises with the number of affected relatives and the severity of the defect; and where one sex is less often affected, as females in pyloric stenosis, affected members of that sex carry a higher risk for their relatives (the Carter effect).
Multifactorial traits explain most common diseases, so prevention depends on modifying environment, such as folic acid supplementation and diet.
Q7(c) · Culture, Communication and Research Methods · 15 marks≈ 11 min
Tools of Data Collection and Analysis
Discuss the applicability of various sampling techniques in selecting the study group.
हिंदी में प्रश्न
अध्ययन समूह के चुनाव में विभिन्न प्रतिचयन तकनीकों की प्रयोज्यता की विवेचना कीजिए।
Practise this question Culture, Communication and Research Methods notes
Model answer
Paper and question: Paper I, Q7(c)
Approach: Define sampling, explain probability and non-probability techniques, and show which suits which kind of anthropological study group, with examples; end with issues of size and representativeness.
Sampling is the selection of a part of a population (the sample) from which conclusions can be drawn about the whole (the universe). Classical ethnography often studied a whole small community, but larger villages, towns, dispersed tribes and biological surveys require sampling.
Probability sampling, where every unit has a known chance of selection, permits statistical generalisation: (i) simple random sampling from a list such as a household census; (ii) systematic sampling, every nth house; (iii) stratified sampling, used in a multi-caste village to ensure that Brahmin, OBC, Dalit and tribal households are each represented; (iv) cluster and multistage sampling, as in the National Family Health Survey, which selects districts, then villages, then households. Anthropometric and genetic surveys need random, adequately sized samples to estimate means and gene frequencies.
Non-probability sampling suits qualitative, exploratory work: purposive or judgement sampling of key informants such as priests, headmen or healers; snowball sampling to reach hidden or stigmatised groups such as migrant labourers; quota sampling to fill set categories; and theoretical sampling in grounded theory, where cases are added until saturation.
Applicability: the choice depends on aims, population size, availability of a sampling frame and resources. Village ethnography usually begins with a full household census, then purposive selection of cases.
Bias, non-response and small size threaten representativeness; combining techniques and triangulating with other data improves validity.

Question 8 (50 marks)

Q8(a) · Culture and Society · 20 marks≈ 14 min
Society, Social Institutions, Groups and Stratification
Examine critically the concept of social stratification as a basis for sustaining social inequality.
हिंदी में प्रश्न
सामाजिक असमानता की निरन्तरता के आधार स्वरूप सामाजिक स्तरीकरण की अवधारणा का आलोचनात्मक परीक्षण कीजिए।
Practise this question Culture and Society notes
Model answer
Paper and question: Paper I, Q8(a)
Approach: "Examine critically" whether stratification sustains inequality: define it, show the mechanisms that reproduce inequality (ideology, inheritance, closure) with caste and class examples and the conflict theorists, then the functionalist defence and evidence of mobility; conclude with a balanced view.
Social stratification is the ranking of people into layers with unequal access to wealth, power and prestige that persists across generations; it differs from simple differentiation by age or sex found even in egalitarian bands.
Stratification sustains inequality through inheritance: in closed systems status is ascribed; caste fixes occupation and marriage by birth, and Louis Dumont (Homo Hierarchicus, 1966) showed how the opposition of pure and impure ranks groups; slavery and estates passed status down by law.
Through ideology: Marx argued that the class owning the means of production also produces the ruling ideas, so inequality appears natural; karma and dharma or racial theories have legitimised hierarchy.
Through closure and capital: Max Weber showed that status groups monopolise opportunities; Pierre Bourdieu showed that cultural capital passed through families and schools reproduces class advantage; Gerald Berreman (1960) compared caste with racial stratification in the American South.
Functionalist defence: Kingsley Davis and Wilbert Moore (1945) argued stratification motivates the most able to fill the most important positions; Melvin Tumin (1953) replied that it restricts talent among the poor and is self-perpetuating.
Countervailing evidence: Morton Fried's egalitarian societies, such as hunter-gatherers, show inequality is not universal; Sanskritization (Srinivas), education, Article 17, reservations and the rise of a Dalit middle class show mobility within stratified orders.
Diagram: a flat bar for an egalitarian band, a stepped cone for a rank society and a pyramid for a stratified society, after Fried.
Thus stratification is a major mechanism for sustaining inequality, but it is neither universal nor unchangeable, and democratic institutions and mobility can weaken it.
Q8(b) · Human Genetics: Methods, Inheritance and Chromosomes · 15 marks≈ 11 min
Mendelian Genetics and Patterns of Inheritance in Man
Describe the genetics and inheritance patterns of the ABO and Rh blood groups in man.
हिंदी में प्रश्न
मनुष्य में ABO और Rh रक्त समूहों के आनुवंशिकी और वंशानुक्रम विन्यासों का वर्णन कीजिए।
Practise this question Human Genetics: Methods, Inheritance and Chromosomes notes
Model answer
Paper and question: Paper I, Q8(b)
Approach: Describe the ABO system (discovery, locus, alleles, codominance, genotypes and phenotypes, a worked cross, Bombay phenotype) and then the Rh system (discovery, genes, nomenclature, inheritance, haemolytic disease), with distribution data and a Punnett square.
ABO system: discovered by Karl Landsteiner in 1900, it is controlled by a gene on chromosome 9 with three alleles, IA, IB and i, a classic case of multiple alleles (Bernstein, 1924). IA and IB are codominant and both dominant over i, giving six genotypes and four phenotypes: A (IAIA, IAi), B (IBIB, IBi), AB (IAIB) and O (ii).
Inheritance: a cross between an IAi and an IBi parent can produce children of all four groups, A, B, AB and O, each with a probability of one quarter. The Bombay phenotype (Bhende and colleagues, 1952) arises when homozygosity for a recessive allele h prevents formation of the H precursor, so the person types as O, an example of epistasis.
Rh system: discovered by Landsteiner and Wiener (1940), it is controlled by the RHD and RHCE genes on chromosome 1. The presence of the D antigen makes a person Rh positive (DD or Dd), while Rh negative people are dd.
Clinical significance: an Rh negative mother carrying an Rh positive foetus may form anti-D antibodies that cause haemolytic disease of the newborn in later pregnancies; anti-D immunoglobulin prevents this.
Distribution: group O is commonest worldwide, B is frequent in Central and South Asia including north India, and Rh negative frequency is about 15 per cent among Europeans but about 5 per cent in India.
Diagram: a Punnett square for IAi × IBi giving IAIB, IAi, IBi and ii in equal proportions.
Q8(c) · Human Evolution: Theories and Concepts · 15 marks≈ 11 min
Biological and Cultural Factors in Human Evolution
Critically discuss the synergistic effect of biological and cultural factors in human evolution.
हिंदी में प्रश्न
मानव विकास में जैविक और सांस्कृतिक कारकों के सहक्रियात्मक प्रभाव की आलोचनात्मक चर्चा कीजिए।
Practise this question Human Evolution: Theories and Concepts notes
Model answer
Paper and question: Paper I, Q8(c)
Approach: Explain synergy (each factor amplifying the other) with three or four feedback chains backed by evidence, then critically note debates and limits (mosaic timing, competing hypotheses), and conclude.
A synergistic effect means that biological and cultural factors did not act separately but reinforced each other, so their combined effect exceeded the sum of each. This biocultural feedback is central to modern views of hominisation.
Tools and brain: stone tools (Oldowan, about 2.6 million years) gave access to meat and marrow, which supported brain growth, and larger brains made better tools such as the Acheulian handaxe.
Fire, cooking and gut: Richard Wrangham's cooking hypothesis (Catching Fire, 2009) argues that cooked food released energy and allowed smaller teeth and guts; the expensive tissue hypothesis (Aiello and Wheeler, 1995) explains how a smaller gut freed energy for the brain.
Obstetric dilemma and social life: a narrow bipedal pelvis and a large-brained baby produced helpless infants, which required pair bonding, food sharing and cooperative breeding; this social life in turn favoured larger brains (Robin Dunbar's social brain hypothesis) and language.
Critical view: the factors did not rise together; bipedalism preceded tools and large brains by millions of years, a mosaic pattern shown by Lucy. The primacy of tools, diet, social life or climate variability (Rick Potts) is still debated, and the obstetric dilemma itself is now questioned.
On balance, the synergy model is the best explanation available: biology opened possibilities and culture exploited and amplified them, making humans a biocultural species.

UPSC Mains 2024 Anthropology Paper II