BIOL 3300 Study Guide - Sexy Son Hypothesis, Assortative Mating, Sexual Selection
Document Summary
Different direct indicators that females can use to determine if males have good genes. Speaker placed in front of the females and played male calls. Below 1 lower score and moved away from the speaker. Above 1 higher score and moved closer to the speaker. Mhc: major histocompatibility complex: molecule from class 1 & class 2 combine to produce antigen, humans average 6 class 1, 8 class 2, chose mate to maximize diversity in offspring, sticklebacks (fish) have 2-8mhc alleles class 2. Found offspring with 5-7 alleles have a lower parasite load. Size of the stalk is correlated to the size of the individual; also larger in males than females in relative size. If variation in eyestalks and preferences are correlated we should lead to assertive mating: preference for short you will mate with short male eyestalks. No male-male competition is seen such as in harbor seals we see no sexual dimorphism.
