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Hello, I was just reading that Denisovan DNA isn't prevalent in all ethnic groups referred as "negrito" https://en.wikipedia.org/wiki/Denisovan#Modern_humans h
by nextaccountic 5y ago
Hello, I was just reading that Denisovan DNA isn't prevalent in all ethnic groups referred as "negrito"
https://en.wikipedia.org/wiki/Denisovan#Modern_humans https://en.wikipedia.org/wiki/Denisovan#Modern_humans
> A 2011 study found that Denisovan DNA is prevalent in Australian Aborigines, Near Oceanians, Polynesians, Fijians, Eastern Indonesians and Mamanwans (from the Philippines); but not in East Asians, western Indonesians, Jahai people (from Malaysia) or Onge (from the Andaman Islands). This means that Denisovan introgression occurred within the Pacific region rather than on the Asian mainland, and that ancestors of the latter groups were not present in Southeast Asia at the time, which in turn means that eastern Asia was settled by modern humans in two distinct migrations.[34] In the Melanesian genome, about 4–6%[19] or 1.9–3.4% derives from Denisovan introgression.[54] It was reported that New Guineans and Australian Aborigines have the most introgressed DNA,[16] but Australians have less than New Guineans,[55] until a 2021 study discovered 30 to 40% more Denisovan ancestry in Filipino Negritos than in Papuans, by their estimates roughly 5% of the genome. They recorded the highest levels in the Aeta genome.[37] In Papuans, less Denisovan ancestry is seen in the X chromosome than autosomes, and some autosomes (such as chromosome 11) also have less Denisovan ancestry, which could indicate hybrid incompatibility. The former observation could also be explained by less female Denisovan introgression into modern humans, or more female modern human immigrants who diluted Denisovan X chromosome ancestry.[42]