PSYC 3420 Chapter Notes - Chapter 8: Sibs, Inclusive Fitness, Parental Investment
24 Apr 2012
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Chapter 8 evolutionary psychology: due to inclusive fitness, ppl differ in genetic relatedness; 12. 5 to cousins, 25% to gp; 50% to parents, theory and implication of inclusive fitness, hamilton"s rule: Property of actions or effects, calculated by own reproductive success plus effect on his relatives. We would expect altruism not to evolve; could if costs outweigh the benefit to the recipient of the altruism; multiplied by the probability that the recipient carried a copy of the altruism gene. Natural selection favors it when c>rb(cost, r-relatedness, b-recipient) Selection will favor a . 5 kin if 2x the cost to the actor; or if benefits to a . 125 member are more than 8x cost of the actor. Well save 3 bros but not just 1. Defines conditions where the adaptations can evolve; selection pressures- evolvability constraint-only genes that meet conditions of. Inclusive fitness renders parenting special case of kinship as well as other cases.
