Just thinking back to it, we were taught in year 8 in 2014 about how just because someone has the 46 XY karyotype does not mean to say that they will always develop fully as physically male (male phenotype) and may even in some cases be completely female with no noticeable differences in development from their 46 XX karyotype female peers
Spoke to my sister who was taught it at a similar stage, she's 8 years older than me which would have put that in around 06
I genuinely wonder if this is still taught, or if the successive regimes have scrubbed it for being against the regime