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[QUOTE]Originally posted by Djehuti: [QB] [QUOTE]Originally posted by the lioness,: [qb] Genetic evidence for archaic admixture in Africa Michael F. Hammer Abstract A long-debated question concerns the fate of archaic forms of the genus Homo: did they go extinct without interbreeding with anatomically modern humans, or are their genes present in contemporary populations? This question is typically focused on the genetic contribution of archaic forms outside of Africa. Here we use DNA sequence data gathered from 61 noncoding autosomal regions in a sample of three sub-Saharan African populations (Mandenka, Biaka, and San) to test models of African archaic admixture. We use two complementary approximate-likelihood approaches and a model of human evolution that involves recent population structure, with and without gene flow from an archaic population. Extensive simulation results reject the null model of no admixture and allow us to infer that contemporary African populations contain a small proportion of genetic material (≈2%) that introgressed ≈35 kya from an archaic population that split from the ancestors of anatomically modern humans ≈700 kya. Three candidate regions showing deep haplotype divergence, unusual patterns of linkage disequilibrium, and small basal clade size are identified and the distributions of introgressive haplotypes surveyed in a sample of populations from across sub-Saharan Africa. One candidate locus with an unusual segment of DNA that extends for >31 kb on chromosome 4 seems to have introgressed into modern Africans from a now-extinct taxon that may have lived in central Africa. Taken together our results suggest that polymorphisms present in extant populations introgressed via relatively recent interbreeding with hominin forms that diverged from the ancestors of modern humans in the Lower-Middle Pleistocene. ______________________________________________________ Therefore assuming that by looking she is "archaic admixed" this is potentially an admixture of human species indigenous to Africa [/qb][/QUOTE]Actually lyinass, I never presumed admixture with Archaic hominids among any of the people in discussion. My conjecture is that they [i]preserved[/i] such archaic traits from their ancestors since we know such features were typical of early modern humans! The earliest known modern human in the Maghreb is Jebel Irhoud of Morocco below. [IMG]http://4.bp.blogspot.com/-d2GFm6FD4Ac/Tdd9jbe5tGI/AAAAAAAAIE0/IGpREWTXvuA/s400/Jebel_Irhoud.jpg[/IMG] http://25.media.tumblr.com/a3397616a652b7172c5a724f0d3c4200/tumblr_mfuv0tFFaR1r5jpyco1_1280.png Jebel Irhoud was contemporary with and bears the same features as Skhul 5 of Israel below: http://1.bp.blogspot.com/-gYpFeeADEcw/USQjrcEUMwI/AAAAAAAAkz0/eaJxH6UyYms/s1600/skhul_5_big.jpg Both are anatomically Modern humans and such features are what many anthropologists call "[URL=http://www.egyptsearch.com/forums/ultimatebb.cgi?ubb=get_topic;f=8;t=002855]generalized modern[/URL]". As for that paper you keep citing, I explained to you before that geneticists don't even know all the nuances of the modern human gene pool or even that of Africans which have the oldest gene pool in the world. Hell, an African American man in South Carolina was recently discovered to have an [URL=http://www.egyptsearch.com/forums/ultimatebb.cgi?ubb=get_topic;f=8;t=008405]unknown Y-chromosomal haplogroup[/URL]. Like the scientists you cite there are already speculations of 'Neanderthal' admixture but the problem is there is no evidence of Neanderthals in West Africa where the guy's ancestry is. [/QB][/QUOTE]
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