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Out-of-Africa versus the multiregional hypothesis

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Out-of-Africa versus the multiregional hypothesis
Broadly speaking, there are two competing hypotheses on the origin of modern humans: the Out-of-Africa hypothesis and the multiregional hypothesis. Both agree that Homo erectus originated in Africa and expanded to Eurasia about one million years ago, but they differ in explaining the origin of modern humans (Homo sapiens sapiens). The first hypothesis proposes that a second migration out of Africa happened about 100,000 years ago, in which anatomically modern humans of African origin conquered the world by completely replacing archaic human populations (Homo sapiens; Model A). The multiregional hypothesis states that independent multiple origins (Model D) or shared multiregional evolution with continuous gene flow between continental populations (Model C) occurred in the million years since Homo erectus came out of Africa (the trellis theory). A compromised version of the Out-of-Africa hypothesis emphasizes the African origin of most human populations but allows for the possibility of minor local contributions (Model B).

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Researchers have used distinct markers from human subpopulations to trace back to our common African root in a giant human "tree." However, a “trellis” model might be more appropriate.


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Sujay Rao Mandavilli 05/08/2013 Request more mainstream researchers to take up indology

sujay rao mandavilli

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