Abstract
The selective forces responsible for the evolution of genes mediating recombination are discussed. These genes originated because of their role indna repair. In eukaryotes, their role in repair is not sufficient to account for the evolution of meiosis and syngamy. Therefore, a “hitch-hiking” explanation is required, according to which a recombination gene gets a lift in frequency from the high-fitness genes to which it is linked. Such hitch-hiking models are reviewed: collectively they provide an adequate explanation for the maintenance of sex and recombination in eukaryotes. In prokaryotes, the main selective force favouring recombination isdna repair: the cross-overs caused by recombination may occasionally have important evolutionary effects, but they are the consequences, rather than the causes, of the evolution of recombination in prokaryotes. In both prokaryotes and eukaryotes, recombination genes also cause specific, repeatable and adaptive rearrangements of the genetic material.
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Smith, J.M. The evolution of recombination. J. Genet. 64, 159–171 (1985). https://doi.org/10.1007/BF02931144
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DOI: https://doi.org/10.1007/BF02931144