Dictionary of Human Evolution and Biology

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Effective Breeding Population

1. the size of the actual population (N) that are fecund; in humans, the size of the actual population less children and women after menopause.

2. the number of individuals in an ideal, randomly breeding population with a 1: 1 sex ratio that would have the same rate of heterozygosity decrease due to drift as the real population under consideration.

Cf. the effective population number or size.

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