GYNANDROMORPHISM

From Big Medical Encyclopedia

GYNANDROMORPHISM (grech, gyne the woman + aner, andr[os] the man + morphe a look, an image) — a combination at an individual of a diclinous type of men's and female signs.

At G. separate body parts have either only men's, or only a female sign. Development of each such site goes from the very beginning in the direction of the defined sex, unlike interseksa (see), at to-rogo at first same-gender signs, and a pillbox — another develop, and intermediate bodies on a structure are often formed. Division into men's and female half can be correct, and the plane of division can pass through the plane of symmetry of a body — half G. (e.g., the same-gender right side, left — another). At half G. one gonad can be men's, and another — women's. Such individuals are often called hermaphrodites (see. Hermaphroditism ). Quite often the wrong, mosaic distribution of signs of one and other floor meets, and same-gender signs can be much less, than another.

It is more often observed at animals whose development of sexual characters is defined only by chromosomal complement (more among insects). However G. occurs also among vertebrata whose sexual characters substantially are defined by hormones of gonads. Half G. is described at some birds. There are data on G.'s presence among mammals and even at the person (doubtful cases, perhaps interseksa). G.'s reason consider early differentiation of sex cells in a germ, at half G. — for a mode of formation of the two first blastomeres.

See also Pseudohermaphroditism .

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