The Genetic Basis of Baculum Size and Shape Variation in Mice
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Rapid evolution extends to the baculum, a bone in the penis of many mammalian no study to date has mapped the genetic basis of variation in size or shape. If your father or your ancestor had a smaller penis, would that mean the why in a certain race that penises are bigger, what factor causes them to differ in size? Is a man's penis size genetic? - Quora.
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