Cloned clams steal genes from other species


By Michael Marshall ASIAN clams don’t usually bother with sex, but it turns out that they do occasionally commandeer genes from other species. The discovery suggests that even asexual species swap genes from time to time. Several clams in the Corbicula genus avoid the risks of finding a mate by never having sex. But if all individuals of a species go without sex, over time harmful mutations build up and the species can die out. “There are almost certainly systems where strict asexuality arises, and the lineages go extinct over evolutionary time,
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