X chromosome inactivation results in the

a. total inactivation of both X chromosomes.
b. inactivation of only the paternal X chromosome.
c. inactivation of only the maternal X chromosome.
d. inactivation of either the paternal X chromosome or the maternal X chromosome.
e. nonrandom inactivation of X chromosomes in the initial cells of tissues.


ANSWER: d

Biology & Microbiology

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