Sexual selection

Sexual selection is the theory proposed by Charles Darwin that states that the frequency of traits can increase or decrease depending on the attractiveness of the bearer. Biologists today distinguish between "male to male combat" (it is usually males who fight), "mate choice" (usually female choice of male mates) and "mate coercion" (forced mating). Traits selected for by male combat are called "weapons", and traits selected by mate choice are called "ornaments". Much attention has recently been given to cryptic female choice, a phenomenon in internally fertilising animals such as mammals and birds, where a female may simply dispose of a male's sperm without his knowledge. The equivalent in male-to-male combat is sperm competition.
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Natural selection operating on factors that contribute to an organism's mating success. Natural selection in relation to sex. Link to a a lecture of sexual selection.

sexual selection /'seksjuəlsi'lekʃn/
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B: (Biologi) seleksi seksual
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