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.

Browse dictionary by letter

a b c d e f g h i j k l m n o p q r s t u v w x y z

Psychology term of the day

December 20th 2024

dysthymic disorder

in DSM–IV–TR, a mood disorder characterized by symptoms that are less severe but more enduring than those in major depressive disorder. It is identified as persistent depressive disorder in DSM–5. Also called dysthymia.