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";s:4:"text";s:2599:"Sexual dimorphism largely results from sexual selection (see handout). Males usually weight close to 120-155 grams and females weigh about 110-130 grams.

It is difficult to understand why selection would favor the male peacock's tail. (1978), is still the most conspicuous … Most of these sexually dimorphic behaviors are part of the reproductive repertoire. Sexual dimorphism, the differences in appearance between males and females of the same species, such as in colour, shape, size, and structure, that are caused by the inheritance of one or the other sexual pattern in the genetic material. Sexual Dimorphism and sexual selection . Sexual dimorphism refers to the differences between the sexes other than their sex organs. The sexually dimorphic nucleus (SDN) of the preoptic area of the hypothalamus, as first described in the rat by Gorski et al. Sexual dimorphism is a concept in biology.

It is easy to understand how natural selection can favor longer legs and sharper fangs in animals.

It means that the male and the female of a species look noticeably different.
Sexual dimorphism refers to the differences between the sexes other than their sex organs.

Sexually dimorphic displays of parenting and infanticide are differentially controlled by GABAergic neurons in the medial amygdala in an activity level-dependent manner. Sexual dimorphism is the systematic difference in form between individuals of different sex in the same species. In many species, the male produces complex song, whereas the female does not. Many animal behaviors differ between the sexes and are therefore referred to as sexually dimorphic (dimorphic means having two forms). The word comes from the Greek : di (two) and morphe (form). Male and female tarsier monkeys are sexually dimorphic in size. A good example is apparent in songbirds. Single-cell transcriptomic analysis reveals cell type-specific molecular sex differences in GABAergic neurons, highlighting a connection between sexual dimorphism at levels of molecules, cells, circuits, and behavior. In others, such as some spiders, the female is larger than the male. For example, in some species, including many mammals, the male is larger than the female. This is because we are sexually dimorphic animals. Males usually weight close to 120-155 grams and females weigh about 110-130 grams. The sexually dimorphic nucleus (SDN) is an ovoid, densely packed cluster of large cells located in the medial preoptic area (POA) of the hypothalamus which is believed to be related to sexual behavior in animals.
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