Question

Why does natural selection favor mate choice? What factor is most important in determining which sex exhibits mate choice?

Answer 1

Sexual selection favors traits that give the bearer an advantage in attracting high qualities of mates or competing for them. Such traits can also contribute to prezygotic isolation between population ,which is cinsidered as best step for speciation.

Mate choice which is otherwise known as intersexual selection ,happens only when females choose between male mates. Traits selected by male are often known as secondary sexual characterstics like horns , antlers etc which Darwin considered as weapons and the traits selected by mate choices are known as ornaments.