Genetics
Researchers have identified XY genes in a female marmoset
Published in Health and Medicine Week, January 5th, 2004
According to recent research from England, "a marmoset (Callithrix jacchus) with atypical external genitalia was phenotypically and genetically characterized. Testosterone concentration correlated with that of female marmosets. Externally, there was only one opening for the urethra."
"Internal genitalia were characteristic of those of female marmosets, and consisted of ovaries, with follicles in various developmental stages, and uterus. Microscopically, a normal vaginal structure was found," explained J.M. Sanchez-Morgado and colleagues, Royal Veterinary College, London.
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