Sex chromosomes linked to evolution of new species.

Asian News International | September 28, 2009 | Copyright

Byline: ANI

London, September 28 (ANI): 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.

Up until now, most evidence has shown that new species arise because they have adapted to new environments.

But, according to a report in Nature News, scientists 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 ...

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