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Two Models for the Origin of H. sapiens

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26.13 Two models for the origin of H. sapiens. Arrows represent ongoing gene flow among populations.
A Multiregional model. H. sapiens slowly evolves from H. erectus in many regions.
B Replacement model. H. sapiens rapidly evolves from one H. erectus population in Africa, then disperses and replaces H. erectus populations in all regions.
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