ARCH 131 Lecture Notes - Lecture 13: Human Taxonomy, Amharic, Population Bottleneck
7 Apr 2017
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Document Summary
Until 30,000 bp there was always a variety of hominin species around. Argues that amhs evolved exclusively in africa, some time between 250,000-150,000ya. After 100,000bp we spread out from africa. Between 70,000-30,000 bp, they replaced all other hominids in the world (with little interbreeding) If this is true, then we essentially come from a single population and everyone"s mtdna traces back to a woman who lived in africa during this time, our great (x3000) grandmother mitochondrial eve . Estimated movement of amhs out of africa, into rest of the world. Genetic: especially mitochondrial dna, y chromosome data. Compared to most animal species, modern humans have a very low degree of variability in our mitochondrial dna. There also appears to be a low degree of variability in the y chromosome of modern males. Data suggests we experienced a recent genetic bottleneck (founder effect) 70- Among modern humans, african groups have greatest genetic variability.
