Which of the following statements is most true regarding X- inactivation?
A) X- inactivation is caused primarily by the expression of several small noncoding RNAs sncRNA .
B) When a cell divides,the inactive X- chromosome remains inactive in the newly formed cell.
C) X- chromosomes that remain active are called Barr bodies.
D) X- inactivation is more common in males than females.
E) X- inactivation results in repressing the expression of approximately 75% of the genes on the X- chromosome.
Correct Answer:
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