The central problems with sex

The central problems with sex - Parthenogenetic females n...

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The central problems with sex : 1) sex and recombination mix up any "coadaptation" that a genotype might have to a particular environment; why disturb this if its is adaptive; 2) there is a cost of meiosis associated with putting genes into males that cannot produce eggs. Consider the following model: k = number of eggs, S = probability of survival, Parthenogenetic = unfertilized eggs develop into females. # adults # eggs adults next generation
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Unformatted text preview: Parthenogenetic females n kn Skn sexual females N 1/2kN 1/2SkN sexual males N 1/2kN 1/2SkN Ratio Partheno/total n/(2N + n) (Skn) / (SkN + Skn) = n / (N + n) If n is small, the parthenogenetic strain has effectively doubled in the next generation. This assumes that the egg production by a sexual and a parthenogenetic female are Å same and that the eggs of sexual females are equally divided between males and females. Why be sexual?...
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This note was uploaded on 11/06/2011 for the course BIO BSC1010 taught by Professor Gwenhauner during the Fall '10 term at Broward College.

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