Too many women in the room! Colour blindness is on the X chromosome, so a woman has to inherit two copies to get it – an X without it will cancel out an X with it. Since men only have one X, they make up the majority of colour blind people.
Too many women in the room! Colour blindness is on the X chromosome, so a woman has to inherit two copies to get it – an X without it will cancel out an X with it. Since men only have one X, they make up the majority of colour blind people.