The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
And other genes on the Y chromosome promote the formation of testes. So there are genes like the SRY gene and other genes that promote the formation of testes, while they also inhibit the formation of the Mullerian Ducts.
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Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
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And that's actually how the presence of these genes like SRY and Mullerian inhibiting hormone, lead to reductions or elimination I should say, of things like the Mullerian Ducts and promote instead what's called in males the Wolffian Ducts. Or promote the development of testes rather than ovaries.
So on the Y chromosome there's a gene, which encodes for something called Mullerian Inhibiting Hormone. So there's actually a hormone that's programmed by the Y chromosome that inhibits the formation of Mullerian Ducts, which are an important part of the female reproductive apparatus.