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Sex Chromosomes and the Evolution of Species Monday, September 28, 2009 - Ehud Rattner Home >> Headlines >> Biology   
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Experiments in stickleback fish have shown for the first time that the evolution of new sex chromosomes is the driving force behind the formation of a new vertebrate species. A study to be published by Nature found that the emergence of new sex chromosomes caused a population of threespine stickleback fish in the Japan Sea, to diverge from its Pacific Ocean–dwelling ancestor (Gasterosteus aculeatus) — creating a new species. (source: nature.com)
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