Males compete all the way to sperm shape

Males compete all the way to sperm shape

Sexual competition may drive the proteins that make up mammalian sperm

By Bethany Brookshire, 17:07 PM April 9, 2014

Rams glare, charge and lock horns. Frogs chorus in a deafening battle of the bands. Two walrus tangle in a multi-ton weight war. There are examples of males fighting over females throughout the animal kingdom. This sexual selection is often dramatic, violent and can even be a matter of life or death.

But sexual competition doesn’t end when boy gets girl. It persists down to the microscopic level, as sperm race for the egg. And a new study shows that competition influences the smallest parts of...

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