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Intersex biology may include, for example, ambiguous-looking external genitalia, karyotypes that include mixed XX and XY chromosome pairs (46XX/46XY, 46XX/47XXY or 45X/XY mosaic).Clinically, medicine currently describes intersex people as having disorders of sex development, a term vigorously contested.Since the adults take several years to change from female to male, the broodstock are extremely valuable individuals.When spotted hyenas were first discovered by explorers, they were thought to be hermaphrodites.This condition is seen in many common garden plants.A closer analogy to hermaphroditism in botany is the presence of separate male and female flowers on the same individual—such plants are called monoecious.Sequential hermaphrodites can only change sex once.which states that if an individual of a certain sex could significantly increase its reproductive success after reaching a certain size, it would be to their advantage to switch to that sex.

Intersex is in some caused by unusual sex hormones; the unusual hormones may be caused by an atypical set of sex chromosomes.Another common cause of being intersex is the crossing over of the SRY from the Y chromosome to the X chromosome during meiosis.The SRY is then activated in only certain areas, causing development of testes in some areas by beginning a series of events starting with the upregulation of SOX9, and in other areas not being active (causing the growth of ovarian tissues).Monoecy is especially common in conifers, but occurs in only about 7% of angiosperm species.A hermaphrodite possesses male and female reproductive organs.

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