The Multiregional Evolution and African Replacement models emphasize gene flow and genetic drift, respectively, in explaining human evolution.
Multiregional Evolution model emphasizes the impact of gene flow, whereas the African Replacement model emphasizes the impact of genetic drift.
The founder effect is a magnification of genetic drift in a small population that migrates away from a large parent population carrying with it an unrepresentative set of alleles.
Assimilation Hypothesis combines elements from the Out of Africa model and the Multiregional Continuity model to explain the origins of modern humans.
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