If this was an X chromosome, then in that case we would have a female individual. Now let's discuss how the age of the female actually affects or actually increases the likelihood of down syndrome. So remember, in female individuals, all the excels that the female individual will ever have in her lifetime are formed before birth. So all the excels a female individual will ever have are formed before birth. And what that means is, as the female individual actually ages, so do her ex cells. And so as that individual ages, her X cells ages.