ANTHROP 1AB3 Lecture Notes - Lecture 14: Candelabra, Melanin, Carl Linnaeus
6 Mar 2017
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Document Summary
Proposed that a common ancestor of all modern humans existed. Model developed in response to apparent regional continuity in fossil record. Unlike candelabra model, suggest that were was genetic exchange between regions of the globe. Incomplete displacement, with local interbreeding with archaic hominids. Only about 15% of human variation can be attributed to differences among populations. And yet we can distinguish populations from different continents. Offer a reasonable degree of accuracy assigning individuals to broad geographic origins like continents. Little sense of how much support these categorizations have. There is not one single position we can distinguish with finality. If there are truly genetic boundaries between human populations we should be able to observe corresponding breaks in genetic distribution. Genetic distances between populations within a continent are usually less than those between groups from different continents. Some functional differences - eg. melanin and vitamin d. Derived variant found at high frequency in east asian and native.
