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Researchers Discover How Fruit Flies Know to Mate with Their Own Species Posted: 30 Jun 2013 06:11 AM PDT A team led by UC San Francisco researchers has discovered a sensory system in the foreleg of the fruit fly that tells male flies whether a potential mate is from a different species. The work addresses a central problem in evolution that's poorly understood: how animals of one species know not to mate with animals of other species. For the common fruit fly, Drosophila melanogaster, the answer lies in the chemoreceptor Gr32a, located on sensory neurons on the male fly’s foreleg. read more

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