Natural selection and the advantage of recombination
Gerrish, P. J.; Galeota-Sprung, B.; Cordero, F.; Sniegowski, P. D.; Colato, A.; Hengartner, N. W.; Vejalla, V.; Chevalier, J.; Ycart, B.
Show abstract
The ubiquity of sex and recombination in nature is widely viewed as enigmatic, despite an abundance of limited-scope explanations. Natural selection, it seems, should amplify well-matched combinations of genes. Recombination would break up these well-matched combinations and should thus be suppressed. We show, to the contrary, that on average: 1) natural selection amplifies poorly-matched gene combinations and 2) creates time-averaged negative associations in the process. Recombination breaks up these poorly-matched combinations, neutralizes the negative associations, and should thus be passively and universally favored.
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