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Early Back-to-Africa Migration into the Horn of Africa, Hodgson, 2014
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[QUOTE]Originally posted by xyyman: [QB] ABSTRACT: The history of click-speaking Khoe-San, and African populations in general, remains poorly understood. We genotyped ∼2.3 million single-nucleotide polymorphisms in 220 southern Africans and found that the Khoe-San diverged from other populations ≥100,000 years ago,[b] but population structure within the Khoe-San dated back to about 35,000 years ago[/b]. Genetic variation in various sub-Saharan populations did not localize the origin of modern humans to a single geographic region within Africa; instead, it indicated a history of admixture and stratification. We found evidence of adaptation targeting muscle function and immune response; potential adaptive introgression of protection from ultraviolet light; and selection predating modern human diversification, involving skeletal and neurological development. [b]These new findings illustrate the importance of African genomic diversity in understanding human evolutionary history.[/b] [/QB][/QUOTE]
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