Dictionary of Human Evolution and Biology

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Bottleneck-colonization Model

Corollary to the out of Africa II hypothesis. According to this model all modern humans are descended from a single population that existed in central Africa 300-200 kya. Differences that exist between modern human populations are the result of drift; similarity between modern inhabitants of regions and middle Pleistocene populations that inhabited the same regions is the result of convergence and adaptation to conditions in that particular region, and not because of an ancestral-descendant relationship.

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