Anthropology5_Only_One_Species

Anthropology5_Only_One_Species - Anthro5 18:05 Wekilledthem...

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Anthro 5 18:05 Why is there only one species of hominim now? We killed them All contemporary humans have a recent common ancestor There has been too much geneteic mixing among existing populations to  allow them to become different species Only one species; how many races? To a biologist, race = subspecies A geographically, phenotypically, and genetically distinct population of a  species A race is an incipient species (think like a gradualist) but of course not all  races become species Members of different races differ consistently from each other on a series of  phenotypic traits Note That About 85% of human genetic variation is within groups; only 15% is between within like within this classroom , go to another classroom to compare  in humans most variation is within populations chimps have a small geographic range  More within-group than between-group variation: modern humans Race does not accurately describe human populations Moreover Phenotypic traits do not covary. Racial classification schemes based on  different traits dramatically disagree Genotypes and conventional “racial” markers do not covary. Racial  classification schemes based on phenotypes dramatically disagree with 
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This note was uploaded on 08/25/2011 for the course ANTH 5 taught by Professor Gaulin during the Fall '07 term at UCSB.

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Anthropology5_Only_One_Species - Anthro5 18:05 Wekilledthem...

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