Sexual Selection and Natural Selection - 546 Words

Selection is the functional relationship between phenotypes and fitness. Natural selection is the production of organisms according to their physical attributes whereby off springs of the younger generations takes the strong, desired and inheritable aspects of their parents. They become more adapted to the environment although some does well than others according to their individual traits which are attributed to their phenotypes (Sinervo, 1997). According to Charles Darwin, fitness can be described in three different forms of selection which interferes with the mean of phenotypic traits in a population. They include: directional selection; stabilizing selection; and destructive selection. Directional selection in the long term can lead†¦show more content†¦Unlike natural selection, sexual selection does not adapt individuals to the environment, but it enhances mate acquisition. It also explains how sexually desired traits may have fuelled the fire of rapid organism development. Some of the traits acquired give either negative or positive results. Negative results can even lead to extinction, but positive results can lead to elaborate change that brings about a stronger and better species. Darwin theory of sexual selection observed that female are the limiting sex and most of them are unavailable for sex as they are pregnant or caring for young one. Since male tends to be in excess, they develop ornaments to attract female or engage each other on male contests. Sexual selection is categorized in to two categories; intersexual selection and intrasexual competition. Intersexual selection is also known as mate choice or female choice in which males competes with fellow males for female. This means that the male must develop a feature that would attract the opposite sex; sometimes this can lead to fashion. The conditions determining which factor becomes more limited can be explained by the way of Bateman’s Principle which states that the sex which invest most in producing off springs becomes a limited over which the other sex will fight for. Intrasexual competition is also known as male-male competition where by members of the lessShow MoreRelatedThe Gorill Natural Selection And Sexual Selection1306 Words   |  6 Pages Darwin’s theory is in regards to natural selection and sexual selection. The gorilla is an animal that uses the two selections to determine their protection, feeding, and reproduction. First Charles Darwin described the characteristics and structures that a animal like a gorilla is born with. He states that these characters and structures will have slow changes that will be different than when they were born. Then he believes that they will have characters and structures that are trifling importantRead MoreEssay about Natural and Sexual Selection.678 Words   |  3 PagesNatural and sexual selection One of the first and central mechanisms proposed by Darwin during his life was that of natural selection. Some may refer to this as survival of the fittest, whereby species that produce offspring have been successful in doing so because they have produced random individual features which have lead them to live longer and pro-create offspring with the same inheritable desired features. 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