Insecticide resistance If the frequency of a gene for insecticide resistance is p (a constant), then its frequency in the next generation is given by the expression p(1 + s) f = 1 + sp where s is the reproductive advantage this gene has over the wild type in the presence of the insecticide. Often the selective advantage s is very small. Approximate the frequency in the next generation with a linear approxima- tion, given that s is small.

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Insecticide resistance If the frequency of a gene for
insecticide resistance is p (a constant), then its frequency in
the next generation is given by the expression
p(1 + s)
f =
1 + sp
where s is the reproductive advantage this gene has over the
wild type in the presence of the insecticide. Often the
selective advantage s is very small. Approximate the
frequency in the next generation with a linear approxima-
tion, given that s is small.
Transcribed Image Text:Insecticide resistance If the frequency of a gene for insecticide resistance is p (a constant), then its frequency in the next generation is given by the expression p(1 + s) f = 1 + sp where s is the reproductive advantage this gene has over the wild type in the presence of the insecticide. Often the selective advantage s is very small. Approximate the frequency in the next generation with a linear approxima- tion, given that s is small.
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