It’s not just X and Y chromosomes that determine sex though, from what I’ve heard (from actual biologists). I don’t know the specifics though. I wish we could have up-to-date biology facts like this taught with the basics in grade schools, but I can only imagine the uproar while hostile parents are still going to court over effing gender pronouns.
Incorrect. Without intervention by hormone signals, literally every human fetus would develop as a “female” with all the traditional female sex organs and morphology. I believe they’d even be capable of generating eggs and carrying babies, but I’m not as confident on that.
A lot of people think that the XX or XY is determinative or definitional, but it’s always the hormones, baby.
Fetuses all start as female.
But not really. They still have the Y chromosome, but the genitalia is kinda female before it fully forms
Wrong mate. Check out Swyer syndrome.
XY vs XX chromosome is meaningless, since XY females occur in nature.
We all start as female and testosterone turns half of us into men.
Edit: I also just learned that XX men exist. It’s called De La Chapelle syndrome. TIL.
Plus also various genetic polysomes that can cause people to be intersex
It’s not just X and Y chromosomes that determine sex though, from what I’ve heard (from actual biologists). I don’t know the specifics though. I wish we could have up-to-date biology facts like this taught with the basics in grade schools, but I can only imagine the uproar while hostile parents are still going to court over effing gender pronouns.
Incorrect. Without intervention by hormone signals, literally every human fetus would develop as a “female” with all the traditional female sex organs and morphology. I believe they’d even be capable of generating eggs and carrying babies, but I’m not as confident on that.
A lot of people think that the XX or XY is determinative or definitional, but it’s always the hormones, baby.
No, hormones are necessary for female reproduction. Read about Turner’s Syndrome (one X chromosome).
Also androgen insensitivity syndrome, when cells lack testosterone receptors. The complete version results in females with no uterus.