Saw thread on FB, had to search, TLDR for now:

> Turns out there is only ONE GENE on the Y chromosome that really matters to sex. It’s called the SRY gene. During human embryonic development the SRY protein turns on male-associated genes. Having an SRY gene makes you “genetically male”. But is this “biological sex”?

https://didyouknowfacts.com/biology-professor-breaks-down-why-defining-sex-and-gender-is-actually-not-simple-at-all/
#RebeccaHelm on #BiologicalSex #ChromosomalSex #HumanSexIsComplex
Kurt Vonnegut might have mentioned a number for human sexes....