Oestrogen blocks the nuclear entry of SOX9 in the developing gonad of a marsupial mammal

Abstract excerpt

BACKGROUND: Hormones are critical for early gonadal development in nonmammalian vertebrates, and oestrogen is required for normal ovarian development. In contrast, mammals determine sex by the presence or absence of the SRY gene, and hormones are not thought to play a role in early gonadal development. Despite an XY sex-determining system in marsupial mammals, exposure to oestrogen can override SRY and induce...

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