BIO152H5 Lecture Notes - Lecture 19: Physical Attractiveness, Ovulation, Genetic Recombination
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Her sister died of this condition, but the husband"s family has no history of the condition. Energy isn"t wasted on finding/ securing a mate. More efficient: all individuals are producing offspring. Generation of genetic diversity among offspring (genetic recombination, random segregation, random fertilization) Exposure to predation when searching for a mate. Conflict with the need to find food/shelter/caring for existing offspring. Female mandrill: facial coloration proportional with age (signals reproductive ability) Three spined stickleback: females prefer males with intense red coloration (signals parasite resistance, because parasites reduce intensity) Males and females were typed for hla- a, -b, and -dr. Males wore shirts for two consecutive nights. Women rated smell of shirts on pleasantness, intensity, and memory association. Androstenone - secondary sex characteristic (men give off three times more than women) Secondary sex characteristics correlated with offspring survival. Fluctuating assymetries (fas) result from genetic and environmental stresses during development. Cue of high parasite resistance (parasite theory)
