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We were all taught that the X and Y genes determine sex. Women have a pair of XX chromosomes, and men XY. But what you might not have been taught is that the Y chromosome is much smaller, carrying around 55 genes compared to roughly 900 on the X.
All embryos are technically female until around 12 weeks, when a gene on the Y chromosome kicks in and male development starts (hence why men have nipples). However, it seems the Y chromosome wasn’t always so small – and that’s where the problem lies. It’s shrinking – and some scientists worry it could disappear altogether.
originally posted by: quintessentone
a reply to: FlyersFan
From your source, I get they don't really know what is what.
Could be in a thousand years or infinity...Y chromosome died out in two rodent species, yet they are still around today...
Got any other studies?
originally posted by: Asktheanimals
Reductions in the Y chromosome are the result of a stressed population that seeks to limit its own reproduction. This is a natural selection pressure that is further aggravated by microplastics and drops in testosterone.
originally posted by: GENERAL EYES
This is distressing to females like me who wouldn't be where I am today enjoying the things I enjoy because of the work, minds and protective efforts of strong, yet kind, Y Dominant males.
originally posted by: quintessentone
a reply to: Annee
Yes, and estrogen in the water and the usual other reasons, but the source content is weird. See my comments above. Are there any serious studies on this?