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Unformatted text preview: the intermediate phenotypes are the most fit this is stabilizing selection ; if both extremes are the most fit this is disruptive selection . R. A. Fisher proposed a simple bookkeeping, or population genetics, approach for one locus with two alleles: we have AA, Aa and aa in frequencies p 2 , 2pq, q 2 . Define l ii as the genotype-specific probability of survivorship, mii as the genotype-specific fecundity. We build a model that will predict the frequencies of alleles that will be put into the gamete pool given some starting frequencies at the preceding zygote stage; Genotypes Zygote -----> -----> Adult-----> -----> Gametes AA p 2 l AA p 2 m AA l AA p 2 Aa 2pq l Aa 2pq m Aa l Aa 2pq aa q 2 l aa q 2 m aa l aa q 2...
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- Fall '10