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Sexual dimorphism. Sexual dimorphism is the condition where sexes of the same species exhibit different morphological characteristics, particularly characteristics not directly involved in reproduction. [1] The condition occurs in most dioecious species, which consist of most animals and some plants. Differences may include secondary sex ...
- Sexual Dimorphism Definition
- Sexual Dimorphism Overview
- Sexual Dimorphism in Humans
- Sexual Dimorphism Examples
- Sexual Dimorphism and Evolution
- Sexual Dimorphism and Sexual Selection
Sexual dimorphism is when the genders of a particular species have different characteristics, not related to their sexual organs. On the other hand, a sexually monomorphicspecies would look nearly identical, except for their sexual organs. Sexual dimorphism can be expressed in a number of different traits.
Typically these traits include size, coloration, bone shape, and even bodies that hardly resemble one another. Sexual dimorphism is seen in birds, reptiles, mammals, fishes, humans, and many other sexually reproducing species. This difference in anatomy between genders is thought to be caused by sexual selection,a type of selection driven by the de...
Humans have clearly sexual dimorphic traits. Males are slightly larger than females, as in many primate species. However, in humans, it is much reduced.A male orangutan is much larger than a female orangutan, where a human male is only slightly larger than a human female. Human breasts are different between males and females. Besides Bonobos, this ...
Birds of Paradise
The Bird-of-Paradise is actually an entire family of bird species found from Indonesia to Australia. There are many different species, but almost all of them have evolved some of the most extreme forms of sexual dimorphism of any animals.Seen below is a male of one of the species. The females are typically the same size but contain no special coloration or ornamental feathers. Each species has a unique and complex pattern. In addition, many species have complex courtship rituals in which the...
Ornate Box Turtle
A box turtle is any turtle which has a hinge on its shell, allowing it to completely enclose itself within the shell. Ornate box turtles live on the plains of the United States, across several states. The turtle is a sexually dimorphic species, but only to the trained eye.Both genders have similar markings on their shell, and from afar would appear to be the same. However, the males have several traits which are sexually dimorphic from the females. Males have red eyes, where females have brow...
Sexual dimorphism is a product of evolution. There are many benefits and detriments to sexual dimorphism, and each species has evolved to further this trait or reduce it. In all sexually reproducing animals with distinct genders, there is a fundamental difference in the sexual organs. In hermaphroditicspecies, both sets of organs are present and th...
One force which usually drives sexual dimorphism in evolution is sexual selection. In this form or selection, the interaction between the genders seeking and choosing mates causes differences in the male and female populations.
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. The differences may be extreme, as in the adaptations for sexual selection seen in the exotic plumes and ...
- The Editors of Encyclopaedia Britannica
Mar 16, 2021 · The most extensively studied dimorphic trait in humans is facial dimorphism. While some sexually dimorphic facial traits are mediated by prenatal exposure to sex hormones 7, dimorphism reaches ...
- Karel Kleisner, Petr Tureček, S Craig Roberts, Jan Havlíček, Jaroslava Varella Valentova, Robert Mbe...
- 2021
Aug 25, 2023 · Sexual dimorphism refers to the morphological differences (in form or appearance) between males and females of the same species aside from the differences in sexual organs. This means that the males are recognizable from the females of the same species. Hence, sex can be readily identified based on morphological features.
Mar 27, 2013 · Sexual shape dimorphism diverged among the nine species, however the evolution of sexual shape dimorphism was constrained by evolutionary history. This provides evidence that, while allometry is a large part of the evolution of sexual shape dimorphism in this system, it is not the main factor driving shape dimorphism.
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Jan 1, 2022 · Sexual dimorphism is known to be regulated by genes located in sexual chromosomes (Haqq and Donahoe 1998 ). Most differences are observed on adult individuals and are linked to the production of sex hormones involved in growth, metabolism, endocrine activity, life expectancy, and behavior (Glucksmann 1974 ).
