lecture14

lecture14 - Life Science 15 Concepts and Issues Lecture 14...

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Life Science 15: Concepts and Issues Lecture 14: Reproduction: eggs are big, sperm are small, and men are dogs 2/23/12 I. We’re built differently II. 1. Early nurturing is necessarily female, 2. Males have greater reproductive capacity but no paternity certainty III. Women and men are vulnerable in different ways “I’ve been noticing you around campus. I find you very attractive, would you…” Go out with me tonight? M: 50% F: 50% Come to my apartment? M: 69% F: 6% Have sex with me? M: 75% F: 0% Female Reproductive Investment is initially greater: 1. Lactation 2. Size of gamete- female gamete is less motile 3. Gestation Early nurturing of the child/embryo is necessarily female dominated especially in females. After first mating, additional matings are valuable to males but not very valuable to females. Q: Is the average number of heterosexual sex partners over a person’s life larger for males or females? Has to be the same.
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lecture14 - Life Science 15 Concepts and Issues Lecture 14...

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