this post was submitted on 21 Jan 2025
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At conception the future sex is determined by the chromosomes that the sperm contributes. Once fertilized, there are either X and X or X and Y, which will be XX and XY once meiosis occurs for the first time.
So technically once fertilization occurs(conception), sex has been determined.
No, it isn't. Every Bio textbook I have that discusses it (more than a dozen), is very clear that sex is determined by gonad function/gamete production. Some XY individuals will never produce sperm. Some will produce ova. Some XX individuals will never produce ova. I would bet there is probably at least one case out there where an XX individual produced sperm through some kind of insanely unlikely nondisjunction. And none of this even begins to touch on the variability within the XXY and XO groups. Even if you want to not consider other species, chromosomes ain't it.
You don't define the norm with characteristics of edge cases. The X and Y chromosome groups define biological sex be it male, female, or intersex.
Some people are born with vestigial tails, does that mean that humans may or may not have tails? No, a few hundred people have been born with a vestigial tail in recorded history.
Some people are born with a cleft pallette, does that mean humans can be born with or without a cleft pallette? No, 1 in 1,600 people are born with a cleft pallette.
1 in 1500 to 1 in 2000 people are born intersex. The other 1499 to 1999 people are XY or XX and 98.5% of those have a gender identity that conforms with their biological sex.
You are daft if you take an XX that identifies as a woman and say she isn't female because her ovaries don't produce an ovum. That woman is a sterile female, not intersex.
Some people being born with a vestigial tail and most being born without, does mean people are born with or without a vestigial tail. I don't know how to respond to this, what part aren't you understanding exactly?
I'm guessing it's the parts about biological sex and humans. They're clearly not very familiar with either.