This seems counter intuitive to me. Men having the Y chromosome, but also have and X. Women having two XX but only one is active. So unless those extra Y chr

This seems counter intuitive to me. Men having the Y chromosome, but also have and X. Women having two XX but only one is active. So unless those extra Y chromosome genes are causing issues I’m not sure why it would be different. https://en.m.wikipedia.org/wiki/X-inactivation https://en.m.wikipedia.org/wiki/X-inactivation I think x-inactivation is on a cell by cell level so it could be having 2 X chromosome would be an advantage, though why escapes me.