| http://www.w3.org/ns/prov#value | - By switching off a gene called FoxL2, which exists in all mammals, the ovary cells of adult female mice developed spontaneously into the fully developed, testosterone-producing cells found in male testes, although they could not produce sperm.We take it for granted that we maintain the sex we are born with, including whether we have testes or ovaries, said Robin Lovell-Badge, from the Medical Re
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