Genetic evidence indicates that humans underwent a ________ between 90,000 and 200,000 years ago, which is why the human species is less genetically variable than are other species.

Question

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A bottleneck event is a sharp reduction in population size due to environmental events or human activities. This reduces genetic variation, which is why the human species is less genetically variable than other species. The timeframe given in the question matches with the estimated time of a bottleneck event in human evolution.

Genetic Evidence Indicates That Humans Underwent a ________ Between 90,000