PSYCH361 Chapter Notes - Chapter 9: Nba Coach Of The Year Award, Parental Investment, Sexual Swelling
14 Mar 2016
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Darwin- traits that would be an advantage to the organism would win out over those that would not. Certain-shaped beak evolved because of the advantage it gave the organism in finding food. Distinguished between those traits that are necessary for survival and those involved in mating and rearing of the young. Second process other than survival important in evolution sexual selection. Runaway sexual selection if a female is more willing to mate with a male with a certain trait, then that trait will be favoured and passed on to the next generation. Sexual selection = 2 processes: same sex competition most obvious in male to male competition. Antlers on a male more dominant advantageous: female choice female makes a choice among males characteristics that would help in domination that would help in ornamentation. Primary characteristics those aspects of sexuality that are physiologically primary. Such as organs for production of sperm or eggs.
