Men are more susceptible to some well-known genetic traits simply because they have one X chromosome. They’re known as “X-linked disorders.” They include red-green color blindness, hemophilia, muscular dystrophy, and IPEX syndrome, which affects immune function. Mental retardation, which affects 2 to 3 percent of people in developed countries and significantly more men than women, also has a strong link to the X chromosome.
"Retardation" isn't still the technical term is it?
