Maleness
Tall, thin and strikingly beautiful, model Christie North always felt female. But when she was 15, she discovered she’d been born with male chromosomes. “There was no mention at school that there can be mix ups with your chromosomes”, she complains. “Many people have the same problem – more than you think.” As well as girls with XY chromosomes, one in 500 boys are born with a double XX as well as a Y. Most only find out about their condition when they try to father children and discover they’re infertile.
Until the 1990s, gender was largely about chromosomes. But this principle was challenged when a new gene was discovered which is needed to start the process of ‘maleness’. “I think we’re starting to understand how the brain is hard-wired differently between males and females”, explains Prof. Vince Harley. Scientists are now looking at a further 54 genes which are turned on differently in males and females. They may help to explain why people identify as one gender or the other, regardless of chromosomes.
from journeyman.tv
Related shemale posts:Popularity: 8%