disassortative mating

[ dis-uh-sawr-tuh-tiv ]
/ ˌdɪs əˈsɔr tə tɪv /

noun Animal Behavior, Psychology.

the reproductive pairing of individuals that have traits more dissimilar than would likely be the case if mating were random (contrasted with assortative mating).

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Origin of disassortative mating

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020