BIOL 2400 Lecture Notes - Lecture 9: Limiting Factor, Coevolution, Parental Investment
20 Apr 2017
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Females develop arbitrary preference of variant in male trait. Biol*2400 dr. crease winter 2017: 2. Females produce sons who possess trait: 3. Females who choose and produce preferred variant of male trait produce more grandchildren: 4. Selection favours maintenance of preference in females, which maintains advantage of trait in males leading to self-perpetuating feedback loop: sexy-son model predicts genetic correlation between preferred trait in sons and preference in daughters. Sexual selection: when males make larger parental investment, they should be the choosy sex, skin fold and dark blue stripes are unique to females, expected if they are sex most influenced by sexual selection. Sexual conflict: traits that confer a fitness benefit on one sex but cost to the other, results in antagonistic coevolution. Sexual selection: can also occur in plants, seed parents invest more in reproduction than pollen parents, seed parents should be choosy, pollen parents should compete for mates.
