PSYCH 1XX3 Lecture Notes - Lecture 2: Inclusive Fitness, Sexual Selection, Kin Selection
16 Mar 2018
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Document Summary
The goal of evolution is to pass on genes: aka: reproduce. R is the probability that the actor and recipient share genes. B is the reproductive benefit to the recipient. C is the reproductive cost to the actor. Human involvement can dive natural selection: longer tusked elephants are hunted more because illegal hunters want tusks, thus, elephants with smaller tusks are safer, and live longer, thus they are mating and continuing the small tusk type. Has no goal, it does not actively choose what it is going to change. If elephants being hunted stopped, then there is a possibility that the tusks would be longer for sexual selection: has no goal, so it might happen, but it also might not happen. Shapes reproductive behaviours: doing what is necessary to attract a mate, females show their skin more during a fertile phase of the menstrual cycle in order to attract mates. Anything involving reproductive behaviour (mates/partners) is always sexual selection.
