Tag Archive | "sperm"

Even the sperms show brotherhood!

Wednesday, February 27, 2008


They are created in their thousands, for one purpose: to die for their brothers. They are the enigmatic “parasperm”, infertile sperm that can dominate the ejaculate of some flies. In the fruit fly, Drosophila pseudoobscura, about half the sperm are infertile. Why waste energy producing dud sperm?

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