Biology 1001A Lecture Notes - Lecture 15: Parental Investment
7 Nov 2016
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Cycle 7: sexy times lecture 15: sexual selection. On multiple choice exams, you should be able to identify . How environmental stability influences whether sexual or asexual reproduction is favoured. Lottery principle and red queen principle as environmental (short-term) benefits of sex. How sexual reproduction places different selective forces on males vs. females. Distinction between intrasexual selection and intersexual selection. Why males usually compete for access to females (rather than vice versa), and why in some species this pattern is reversed. Males want to maximize their number offspring (quanitity) and thus compete for access to females as oppose to being picky about their mates. Potential fitness in most species is higher for males than females which sex has higher average fitness. Both males and females have the same average fitness. Relationship between sexual selection and parental investment. Sexual production and sexual recombination is the most common mode of reproduction in animals despite there being multiple costs and downsides to sex.
