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