Psychology 3228 Lecture Notes - Lecture 6: Nepotism, Helping Behavior, Psych

• School: Western University
• Department: Psychology
• Course: Psychology 3228
• Professor: Caroline Strang

Document Summary

Natural selection results in the increase of the best replicators. A gene that assists other genes in replicating will not increase in number itself. Is a behavior that increases reproductive success of another individual. But doe so at a cost to the first individual. Argu(cid:373)e(cid:374)t that (cid:271)eha(cid:448)iors e(cid:448)ol(cid:448)e for the (cid:858)good of the spe(cid:272)ies(cid:859) Genes that self-sacrifice would not be passed on and thus cannot evolve via natural selection. The answer is by only helping those you are related to aka nepotism. Beldi(cid:374)g(cid:859)s grou(cid:374)d squirrels individuals alarm call to warn others of incoming predators: callers are more likely to be eaten self sacrificing. The measure of the proportion of shared genome with another person. It is the probability that a given gene is shared in common between two individuals: mother passes half her genes to each offspring, r=0. 5. Full siblings: from mother maternal genes in common, from father of paternal genes in common, r = (0. 5x0. 5) + (0. 5x0. 5) = 0. 5.