What would be the effect on X Inactivation of adding sIRNAs that eliminated the products of the Xist gene? What would be the effect on X inactivation of adding siRNAs that eliminated the products of the Jpx gene? One of the two X chromosomes would become inactivated Only the maternal X chromosome would become inactivated. Neither of the X chromosomes would become inactivated. Both of the X chromosomes would become inactivated. Only the paternal X chromosome would become inactivated.