kin selection

a variation of natural selection that favors behavior by individuals that will increase the chances of their relatives surviving and reproducing successfully (see altruism). Individuals share 50% of their genes with a parent or sibling, so if they risk their own ability to reproduce or survive but help their parents or more than two siblings to reproduce or survive, they will benefit indirectly by gaining inclusive fitness. Compare direct selection; individual selection.

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Psychology term of the day

September 1st 2024

allocation rule

see classification rule.