Now, what are some of the symptoms of individuals that have the syndrome? Well, because they have that Y chromosome, these will be males. Now, they will be unusually told and because of that additional X chromosome they're going to have female like breasts. And about 50%, about half of them will have some type of mental disability. However, they do live normal lives, so they generally live normal lives. Now, let's move on to the X or the XO carreotype.