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Earthworms are simultaneous hermaphrodites, having both male and female reproductive organs. Simultaneous hermaphrodites (or homogamous hermaphrodites) are individuals in which both male and female sexual organs are present and functional at the same time. [15] Self-fertilization often occurs. [9]
This is an accepted version of this page This is the latest accepted revision, reviewed on 5 January 2025. Atypical congenital variations of sex characteristics This article is about intersex in humans. For intersex in other animals, see Intersex (biology). Not to be confused with Hermaphrodite. Intersex topics Human rights and legal issues Compulsory sterilization Discrimination Human rights ...
Dominance is based on size, the female being the largest and the reproductive male being the second largest. The rest of the group is made up of progressively smaller males that do not breed and have no functioning gonads. [18] If the female dies, in many cases, the reproductive male gains weight and becomes the female for that group.
But unlike sequential hermaphrodites, simultaneous hermaphrodites are both male and female at sexual maturity. Also sex determination does not apply to simultaneous hermaphrodites (except in species with mix mating systems). [4] In simultaneous hermaphrodites, self-fertilization is possible in some species, where in others it is absent. [5]
Likewise, many intersex individuals are born completely sterile, although medical interventions have been known to remove potentially fertile gonads, which makes sex determination often arbitrary. Individuals with XX male develop male genitalia but are entirely infertile due to a lack of SRY gene expression and develop a generally feminine body.
This list of related male and female reproductive organs shows how the male and female reproductive organs and the development of the reproductive system are related, sharing a common developmental path. This makes them biological homologues. These organs differentiate into the respective sex organs in males and females.
Intersex is a general term for an organism that has sex characteristics that are between male and female. [1] It typically applies to a minority of members of gonochoric animal species such as mammals (as opposed to hermaphroditic species in which the majority of members can have both male and female sex characteristics). [2]
In the Tantric sect of Hinduism, there is a belief that all individuals possess both male and female components. This belief can be seen explicitly in the Tantric concept of a Supreme Being with both male and female sex organs, which constitutes "one complete sex" and the ideal physical form. [11] [page needed]