Sexhermaphrodites

Intersex is in some caused by unusual sex hormones; the unusual hormones may be caused by an atypical set of sex chromosomes.One possible pathophysiologic explanation of intersex in humans is a parthenogenetic division of a haploid ovum into two haploid ova.Upon fertilization of the two ova by two sperm cells (one carrying an X and the other carrying a Y chromosome), the two fertilized ova are then fused together resulting in a person having dual genitalial, gonadal (ovotestes) and genetic sex.Another common cause of being intersex is the crossing over of the SRY from the Y chromosome to the X chromosome during meiosis.In these groups, hermaphroditism is a normal condition, enabling a form of sexual reproduction in which either partner can act as the "female" or "male".For example, the great majority of tunicates, pulmonate snails, opisthobranch snails and slugs are hermaphrodites.

Thus, testicular and ovarian tissues will both be present in the same individual.Arthropods are the phylum with the largest number of species.Most hermaphroditic species exhibit some degree of self-fertilization.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.Monoecy is especially common in conifers, but occurs in only about 7% of angiosperm species.

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