<P> Sexual selection is a mode of natural selection where members of one biological sex choose mates of the other sex to mate with ( intersexual selection ) , and compete with members of the same sex for access to members of the opposite sex ( intrasexual selection ) . These two forms of selection mean that some individuals have better reproductive success than others within a population , either from being more attractive or preferring more attractive partners to produce offspring . For instance in the breeding season sexual selection in frogs occurs with the males first gathering at the water 's edge and making their mating calls : croaking . The females then arrive and choose the males with the deepest croaks and best territories . Generalizing , males benefit from frequent mating and monopolizing access to a group of fertile females . Females have a limited number of offspring they can have and they maximize the return on the energy they invest in reproduction . </P>
<P> Sexual selection is a mode of natural selection where members of one biological sex choose mates of the other sex to mate with ( intersexual selection ) , and compete with members of the same sex for access to members of the opposite sex ( intrasexual selection ) . These two forms of selection mean that some individuals have better reproductive success than others within a population , either from being more attractive or preferring more attractive partners to produce offspring . For instance in the breeding season sexual selection in frogs occurs with the males first gathering at the water 's edge and making their mating calls : croaking . The females then arrive and choose the males with the deepest croaks and best territories . Generalizing , males benefit from frequent mating and monopolizing access to a group of fertile females . Females have a limited number of offspring they can have and they maximize the return on the energy they invest in reproduction . </P>
the stage of life at which both sexes become capable of reproduction is
the stage of life at which both sexes become capable of reproduction is
Sexual selection
Sexual selection