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Sexual dimorphism: Difference between revisions
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Since males and females are mostly subject to the same survival selection, one would expect them to be very similar. Any dissimilarity must hence have a different origin than survival selection. One diver of sexual dimorphism may be [[sexual selection]] as proposed by Darwin (1858, 1871), i.e. that mate preferences evolved that shaped the phenotype for each sex differently. Another driver may be differential [[Bateman's principle|parental investment]], i.e. that each sex has different sexual investment in the offspring and thus different mate preferences (e.g. women for a providing male) and is subject to different survival selection (e.g. pregnant women dying of different diseases and at higher rate than men).<ref>https://www.researchgate.net/publication/41391479_Strategies_of_Human_Mating</ref> | Since males and females are mostly subject to the same survival selection, one would expect them to be very similar. Any dissimilarity must hence have a different origin than survival selection. One diver of sexual dimorphism may be [[sexual selection]] as proposed by Darwin (1858, 1871), i.e. that mate preferences evolved that shaped the phenotype for each sex differently. Another driver may be differential [[Bateman's principle|parental investment]], i.e. that each sex has different sexual investment in the offspring and thus different mate preferences (e.g. women for a providing male) and is subject to different survival selection (e.g. pregnant women dying of different diseases and at higher rate than men).<ref>https://www.researchgate.net/publication/41391479_Strategies_of_Human_Mating</ref> | ||
Sexual dimorphism results in different kind of [[intrasexual competition]] for each sex, e.g. men competing with resources and physical power, and women competing merely in looks and with more gossip rather than physical power. | Sexual dimorphism results in different kind of [[intrasexual competition]] for each sex, e.g. men competing with resources and physical power, and women competing merely in looks and with more gossip rather than physical power. Intrasexual competition, in turn can increase sexual dimorphism, e.g. by males evolving to be stronger and taller to achieve high status. | ||
== References == | == References == | ||