| interesting problems |
[Apr. 2nd, 2003|09:52 pm] |
another piece from The Red Queen that can be made into a course problem.
page 225. (given)
Baker and Bellis discovered that the amount of sperm that is retained in a woman's vagina after sex varies according to whether she had an orgasm and when. It also depends on how long it was since she las had sex: The longer the period, the more sperm stays in, unless she has ... "a noncopulatory orgasm" in between.
...
They (B&B) asked about their subjects about their extramarital affairs. They found that in faithful women about 55 percent of the orgasms were of the high-retention type. In unfaithful women, only 40 percent of the copulations with the partner were of this kind, but 70 percent of the copulations with the lover were of this fertile type. Moreover, whether deliberately or not, the unfaithful women were having sex with their lovers at times of the month when they were most fertile. i.e. an unfaithful woman in their sample could have sex twice as often with her husband as with her lover but was still slightly more likely to conceive a child by the lover than the husband.
solve the The Red Queen problem for:
1. husband
2. wife
3. lover |
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| Comments: |
What is the red queen problem?
The Red Queen principle* relates (in this context) to the "arms race" to achieve reproductive success, i.e. propagate one's genes. The wife (woman) is a step ahead, because, compared to the husband (man), she's more in control of her reproductive choices. So, what are the next steps in this arms race? *This principle was proposed by the evolutionary biologist L. van Valen (1973), and is based on the observation to Alice by the Red Queen in Lewis Carroll's "Through the Looking Glass" that "in this place it takes all the running you can do, to keep in the same place."
| From: | (Anonymous) |
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| Date: | April 2nd, 2003 - 06:27 pm |
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| (Link) |
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4. lover's wife
mx.
no way! it's bad enough already :)
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