X-Inactivation Video Lessons

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Problem: 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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X-inactivation: dosage compensation in females

: one of the two X-chromosomes is randomly inactivated

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Problem Details

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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