Article

Is faster-X adaptation due to large-effect mutations? An empirical test of a new theory

2026-02-07

Abstract excerpt

A widespread observation in molecular evolution is that X-linked genes evolve faster—and often adapt faster—than autosomal genes. Three main ideas have been put forward to explain “faster-X” adaptation. The first is that new beneficial mutations are typically partially recessive with respect to fitness, leading to more efficient selection in hemizygous males. The second is that sex differences in recombination, or...

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Literature Corpus work: e1d79519-bdbc-56b9-9dca-73c12736d626
DOI: 10.64898/2026.02.06.704462

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