Dictionary of Human Evolution and Biology

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Incest

1. sexual relationships or matings between parents with their offspring, and often, of siblings or cousins with each other; sex among first or second degree relatives; close endogamy.

See incest taboo.

2. production of offspring by parents who share genes by way of a common ancestor of a specified but culturally variable degree; a form of inbreeding.

Cf. inbreeding coefficient (F), dynastic incest, and royal endogamy.

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