Many hypotheses have been proposed to explain why male intromittent genitalia
consistently tend to diverge more rapidly than other body traits of the same individuals in a …

Publisher Summary This chapter presents a review of mate choice and genetic quality,
defines mate choice, and discusses some of the key issues about how individuals can …

Evolutionary biologists have endeavoured to explain the extraordinary diversity of sperm
morphology across animals for more than a century. One hypothesis to explain sperm …

In one of his few major oversights, Darwin failed to appreciate that male–male competition
and sexual selection can continue even after copulation has begun. The postcopulatory …

Mammalian sperm must spend a minimum period of time within a female reproductive tract
to achieve the capacity to fertilize oocytes. This phenomenon, termed sperm 'capacitation' …

The moment of the fertilization of an egg by a spermatozoon—the point of “sperm success”—
is a key milestone in the biology of sexually reproducing species and is a fundamental …

Sperm are often considered to be individuals, in part because of their unique genetic
identities produced as a result of synapsis during meiosis, and in part due to their unique …

Plutella xylostella exhibits exceptional reproduction ability, yet the genetic basis underlying
the high reproductive capacity remains unknown. Here, we demonstrate that an orphan …

Sperm competition is a powerful selective force driving the evolution of sperm shape and
function. Recent findings suggest that sperm cooperation is a potential evolutionary …

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