Fly Genomes Show Natural Selection and Return to Africa

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Fly Genomes Show Natural Selection and Return to Africa

Drosophila melanogaster, like humans, originated in Africa, and that's where they show the most genetic diversity -- just as humans do. The flies are thought to have appeared in Europe about 50,000 years ago, along with modern humans. On the way, both humans and flies squeezed through genetic bottlenecks that reduced the diversity in the population. Over generations, different fly strains evolved quite specialized niches -- such as a fondness for colonizing breweries, for example.

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