> A tantalizing clue stemmed from men who have two X chromosomes and one Y chromosome, a rare condition called Klinefelter syndrome. These men run a much higher risk of suffering from autoimmune diseases, suggesting that the number of X chromosomes plays an important role.
Interesting. And apparently this is pretty common. Less than 1 in 1000 male births.
Interesting. And apparently this is pretty common. Less than 1 in 1000 male births.