In female kangaroos (marsupials),Multiple Choice The paternal X chromosome is always inactivated into a Barr body. neither the maternal or paternal X chromosome is inactivated into a Barr body. either the maternal or paternal X chromosome is randomly inactivated into a Barr body. both the maternal and paternal X chromosomes are inactivated into a Barr body, but only in about 50% of the total cells. the maternal X chromosome is always inactivated into a Barr body.