#Chromosomes

This talking point needs to die:XX = femaleXY = maleNo. We understood what males & females were before discovering chromosomes. Y chromosomes usually carry the gene for male development, but

1/ Getting some flack for this tweet, so let me clarify. Male and female, as a natural phenomenon, has been known long before the discovery of sex chromosomes. This is

Interesting thread, paraphrased from @Zoe_Brain elsenet, explaining how sex and gender are loads more complex than many folk think.... In 1890, X and Y chromosomes were discovered. Seemingly the men

Matthew Garrett

People think that biological sex is this straightforward thing where if you have two X chromosomes you're female and if you have an X chromosome and a Y chromosome you're

One of my many charming traits is that every time a piece of media calls a tortoiseshell or calico cat “he” I pause it to give the long and detailed

ken 🕸️ | felix's bff

sex and gender: a thread if ur unsure or jus a twat who won't learn sex and gender are not the same. there are "two sexes", as in men XY

Katy Montgomerie 🦗

KatyMontgomerie

I stand by this https://twitter.com/tryingattimes/status/1310327722082742272?s=20GC people (usually) believe that "sex" appears at the moment of conception, is strictly binary, and is immutable. But what is it? How do you measure

Very excited that this collaboration with Sara Cuylen-Haering, Mina Petrovic et al is out in @nature today! 1/n Ever wonder why stuff from the cytoplasm doesn't mix into the nucleoplasm

Women share only 98.5 percent of their genetic makeup with men. That’s 15 times greater than the difference between any two human males, who are about as genetically similar to

This is the correct decision. Semenya is biologically (XY) male with male levels of testosterone produced by internal testes. She should not be competing against female athletes. Without a line

that is by definition a spectrum, yeshttps://twitter.com/nathankw/status/1389193303267086336 also sex defined this narrowly isnt that useful. the arguments for sex segregated spaces or even the effects of sex as a variable

How do we define biological sex?Sex is defined by potential gamete production: If your body developed towards the production of small gametes, you're a male, and if your body developed

Another Angry Woman

This is right up there with the skeletons one, an instant classic. Furthermore, it's actually a very interesting thought experiment to think about how aliens might categorise humans into groups,

Dr. Emmy Zje 💜🌺

For all the things transphobes say about “biological sex," I will just say this…if we sniffed each other and smelled each other's urine for identifying, congregating, and mating, I’d be

Aisling Fawn | Black Lives Matter

Reminder also that the supposed universality of biological s x across the animal kingdom is kind of an artifact of science education tries to describe things in "relatable" languagehttps://twitter.com/holymoley/status/130841581195

RottenInDenmark

This is an excellent overview/debunker of the claims being made in the trans debate right now. However! (1/?)https://seriouspod.com/sio284-debunking-the-end-of-gender-part-1/ One of my frustrations with the discourse around this issue is th