Sexually dimorphic

Sexually Dimorphic

Sexually dimorphic refers to the systematic difference in form between individuals of different sex in the same species. This includes differences in size, color, and the presence or absence of parts of the body used in courtship displays or fights, such as ornamental feathers, horns, and antlers.

Overview

Sexual dimorphism is a phenotypic differentiation between males and females of the same species. This involves differences in the size, color, and presence or absence of body parts used in courtship displays or fights. The term is most often used in the context of sexual selection, where it may influence the evolution of traits and behaviors.

Causes

Sexual dimorphism can be caused by sexual selection, where traits that increase an individual's mating success are favored. This can lead to the evolution of differences between males and females. Other causes include genetic drift and genetic correlation.

Examples

Examples of sexually dimorphic traits include the bright plumage of male birds, the large antlers of male deer, and the size difference between male and female spiders. In humans, sexual dimorphism is evident in characteristics such as body size and shape, facial hair, and voice pitch.

See also

• Sexual selection
• Sexual dimorphism in humans
• Sexual dimorphism in animals

References

Sexually dimorphic Resources
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