In a female human cell, what would be the effect on X inactivation if a mutation occurred in the Xist gene making it nonfunctional?
A) One of the two X chromosomes would become inactivated.
B) Both of the X chromosomes would become inactivated.
C) Neither of the X chromosomes would become inactivated.
D) Only the maternal X chromosome would become inactivated.
E) Only the paternal X chromosome would become inactivated.
