Dictionary of Human Evolution and Biology

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1. animal or plant that has both female and male sex organs in the same individual; the condition is described as hermaphroditism.

2. in botany, describes a species with both male and female structures in the same flower.

3. in humans, true hermaphrodites are mosaic for the sex chromosomes, i.e. some cells in the body are XX, others XY or XXY. Such individuals possess both ovarian and testicular tissue, present either in separate gonads or together in a single gonad. Aka ambiguous genitalia, intersexuality. True hermaphrodites are very rare, about 1:100,000 worldwide, but see the more common pseudohermaphroditism.

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