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.
the selection of a vocation, usually on the basis of such factors as parental guidance, vocational guidance, identification with admired figures, trial or part-time jobs, training opportunities, personal interests, and ability tests.