Where life sciences and social sciences meet (réservé à l’auteur)The definition of races as populations is appealing to biologists. A race can be thus defined as a population where there is a significative distribution of some alleles in contrast to another population. In this population there can even be some subpopulations also distinguished by the significative distribution of alleles. With this concept, a major difference between the white and the black race is the significative distribution of the allele(s) responsible for the color of the skin. The level of significance can thus be asserted for this difference and any other significative one allowing the biologist to accept or reject the null hypothesis, the abscence of significative difference for this or more traits. As for the color of the skin, the studies have come to indicate that this is mostly due to convergent adaptation for different ancestral populations1 rather than to random genetic drift within an ancestral population, this trait having been under strong selective pressure. Therefore, the color of the skin is not related to any other genetic traits (like intelligence and so on) between the people of light or white complexion and those with dark or brown complexion. (Read in the linked page: the Human genetic variation:
-------------------------- 1 Like it seems clear for India |