Prominent trans activist lectures on how cross-sex hormones change biological sex at the genetic level.pic.twitter.com/jjSoj9Y21U
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Gametes are quite definitive.
A person can be anatomically one sex and at the genetic level be the other. There are women who have Swyer Syndrome, which usually results from a mutated SRY gene on the Y chromosome, who have totally normal Y chromosomes. And there are men with XX male, which usually involves...
an X chromosome with an SRY gene, who have no SRY gene or any Y chromosome material. And then there are people with mosaicism and chimerism, whose anatomical sex depends entirely on which organs developed from which of the two cells lines they have.
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