Categories Anthropology

9.5 biological basis of racial classification, racial differentiation and race crossing in man.

Racial classification Racial classification is given to a group of individuals, who share a certain number of anthropological traits, which is necessary such that they are not confused with others. There are two aspects to distinguish people based on phenotypic and genotypic traits. Phenotypic Traits: Phenotypic traits are those physical characteristics of an individual, which […]

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Categories Anthropology

I.9.5 Racial criteria, racial traits in relation to heredity and environment;

The characters upon which races are distinguished- must be non-adaptive hence least influenced by environmental factors. must be hereditary hence genetic in origin. It means racial features will not be affected by the environmental factors to a large extent while the same will be passed on from one generation to another provided there is gametic […]

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Categories Anthropology

I.9.5 Biological basis of morphological variation of non-metric and metric characters.

Metric characters They are labeled as metric because they can be measured in incremental units. They are  simply recorded through various indices. These can be exactly measured based on standardized methods, like stature, head length, head breadth and other body measurements. Cephalic Index (C.l.)  Cranial Index (C.l.) Facial Index Nasal index Stature Non metric characters […]

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Categories Uncategorized

I.9.5 Race and racism,

Previous Year Questions: Differentiate between Race and Racism. What are three major races of the world? Give important biological criteria used frequently for such a classification.(15Marks 2013) Discuss race Crossing in humans with suitable examples (20Marks 2012) Is Race a valid concept? Critically assess the relevance of racial classification in the Indian Context. (30 Marks […]

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Categories Anthropology I

I.9.4.(c) Autosomal aberrations – Down syndrome, Patau, Edward and Cri-duchat syndromes.

Down syndrome/ Trisomy 21 Down syndrome is a chromosome disorder caused by an extra chromosome 21 that results in intellectual disability and physical abnormalities. The most common trisomy in a newborn is trisomy 21 (three copies of chromosome 21, which is the smallest human chromosome). Trisomy 21 causes about 95% of the cases of Down […]

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