EEB318H1 Study Guide - Final Guide: Gradualism, Paraphyly, Inclusive Fitness
25 Jan 2016
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Rates of evolution pp 606-608, gradualism and saltation, pp 609-611; conservatism, pp 611-614; novelty. , 614-620: aggressive competition can be favored by selection, even if the spread of an aggression gene lowers population mean fitness. Kin selection is the evolutionary strategy that favours the reproductive success of an organism"s relatives, even at a cost to the organism"s own survival and reproduction. Kin altruism is altruistic behaviour whose evolution is driven by kin selection. Kin selection is an instance of inclusive fitness, which combines the number of offspring produced with the number an individual can produce by supporting others, such as siblings. Eusociality (true sociality) is used to describe social systems with three characteristics: one is an overlap in generations between parents and their offspring, two is cooperative brood care, and the third characteristic is specialized castes of nonreproductive individuals. [25] the social insects provide good examples of organisms with what appear to be kin selected traits.
