doi: 10.1126/science.1179215.
Clades versus clones in evolution: why we have sex
- PMID: 1179215
- DOI: 10.1126/science.1179215
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Clades versus clones in evolution: why we have sex
Science.
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Abstract
Sexual reproduction predominates among organisms mainly because most evolutionary change is concentrated in speciation events, and asexual species cannot speciate in the normal sense. Asexual clones seldom diversify rapidly enough to overcome normal rates of extinction. In contrast, phylogenetic groups of sexual species (clades) commonly develop broad, heterogeneous adaptive zones rapidly enough to ensure survival.
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