Dictionary of Human Evolution and Biology

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Dutrillaux’s Hypothesis

Four-part proposal erected to explain both the cytogenetic and molecular data available concerning hominoid evolution:
(1) ancestors of the gorilla separated from the human-chimp common ancestor;
(2) the human and chimp ancestors separated;
(3) repeated hybridizations subsequently occurred between the gorilla and chimp ancestors;
(4) reproductive barriers were finally established that precluded hybridization between the gorilla and chimp ancestors.

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