Human embryos (and probably others) start out female, and grow the male parts a fee weeks later. There is probably someone lurking who can give better details but that’s the gist of it. Thats why men have nipples.
Also, it gets much more complicated than that; at least 2% of humans are intersex, meaning they’re a mix of male and female, everywhere from outward presentation (rare) to chromosomal (more common).
It’s not just gender that’s a spectrum: sex is, too. I said ‘at least’ because it’s possible for people to go their whole lives without realising they’re intersex. 2% is huge: if you know 100 people, statistically 2 of them are intersex. Most of us know more than that.
The ‘only two genders’ thing is biologically bullshit. Biology is never cut and dried.
eta: for reference, I have a disorder that’s been in the spotlight lately – Ehlers-Danlos – and you’ve probably at least heard of it. You’ve likely talked to someone who has it recently. It occurs in 1 in 20,000 people. Again, roughly 1 in 50 have intersex traits. I wish this had the visibility it deserves. It’s exceedingly normal.
There’s only around 700 genes in the Y chromosome, with only about 70 actually making proteins. Compare the X chromosome with about 800 protein-coding genes and 20-25,000 total genes.
About the nipples. You’re right in that we all get them by default. As I understand it the only reason males keep them is because evolutionarily it would take more energy to remove them than keep them. Basically we’re all slackers at the genetic level.
And the reception of those hormones, which may not exist or may not be functional for some people.
Turns out making beings out of trillions of cells of 100s of types (all of which have basically the same 3 or 6 billion base pair genome, yet have to act very differently) is complicated and any process has many steps, which involve various genes, receptors, signals, etc, all of which could be interrupted.
Embryos develop proto female genitalia that turns into male genitalia (or further develops into female genitalia). Iirc the seam on your testicles is where the opening closed.
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.
I won’t have you teach my kids about this degenerate matter!
You mean LGBTQIA+ people?
No, degenerate matter! Unless you bring me a glass of, say, electron-degenerate matter, i won’t even entertain these made up states of matter! And shove your Bose-Einstein condensate where the light can’t exit the event horizon!
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.
Can someone explain the meme? I’m a little slow.
Human embryos (and probably others) start out female, and grow the male parts a fee weeks later. There is probably someone lurking who can give better details but that’s the gist of it. Thats why men have nipples.
And a scrotum seam
And my axe!
Omg is my seam meant to be a…
That’s right, you have a scrotussy.
Your penis is an enlarged clitoris and your testicles are ovaries that fell out.
Not if i have something to say about it and i do! I will undergo gender confirmation surgery to fix that!
Based
And estrogen pilled
You pretty much nailed it.
Also, it gets much more complicated than that; at least 2% of humans are intersex, meaning they’re a mix of male and female, everywhere from outward presentation (rare) to chromosomal (more common).
It’s not just gender that’s a spectrum: sex is, too. I said ‘at least’ because it’s possible for people to go their whole lives without realising they’re intersex. 2% is huge: if you know 100 people, statistically 2 of them are intersex. Most of us know more than that.
The ‘only two genders’ thing is biologically bullshit. Biology is never cut and dried.
eta: for reference, I have a disorder that’s been in the spotlight lately – Ehlers-Danlos – and you’ve probably at least heard of it. You’ve likely talked to someone who has it recently. It occurs in 1 in 20,000 people. Again, roughly 1 in 50 have intersex traits. I wish this had the visibility it deserves. It’s exceedingly normal.
Yeah the Y chromosome doesn’t kick in until later in fetal development.
There’s actually a surprisingly small amount of biological information stored on the Y chromosome, IIRC the vast majority lies on the X.
There’s only around 700 genes in the Y chromosome, with only about 70 actually making proteins. Compare the X chromosome with about 800 protein-coding genes and 20-25,000 total genes.
About the nipples. You’re right in that we all get them by default. As I understand it the only reason males keep them is because evolutionarily it would take more energy to remove them than keep them. Basically we’re all slackers at the genetic level.
Awesome! Thanks for explaining.
The He-Man series back in the 80s always ended with little moral quips, so this is mimicking that.
The fact is that all fetuses start off assuming female, and then the presence of certain chromosomes trigger male anatomy.
Hence all males being trans if life starts at conception, as at X week development shifts to generate the male oriented organs.
At least that’s my understanding of this meme…
well, the presence of certain hormones that are usually regulated by some genes on certain chromosomes
Good point, thanks for the correction there!
And the reception of those hormones, which may not exist or may not be functional for some people.
Turns out making beings out of trillions of cells of 100s of types (all of which have basically the same 3 or 6 billion base pair genome, yet have to act very differently) is complicated and any process has many steps, which involve various genes, receptors, signals, etc, all of which could be interrupted.
Thanks for the explanation! That makes more sense.
Embryos develop proto female genitalia that turns into male genitalia (or further develops into female genitalia). Iirc the seam on your testicles is where the opening closed.
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.
I won’t have you teach my kids about this degenerate matter!
You mean LGBTQIA+ people?
No, degenerate matter! Unless you bring me a glass of, say, electron-degenerate matter, i won’t even entertain these made up states of matter! And shove your Bose-Einstein condensate where the light can’t exit the event horizon!
Wait till you hear about the imaginary numbers they’re teaching your kids.
What happened to the good old fashioned numbers which we used to rely on?
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.
sauce
Basically, testosterone is one hell of a drug.