There are genes on the X chromosome that manage to escape inactivation. What particular genes are included in this group and what might be the reason that they remain activated?
A)genes that are missing from the X chromosome; so they will be expressed equally in both sexes
B)genes that are also present on the Y chromosome; so they will be expressed equally in both sexes
C)genes that are also found on Chromosome 1; so they will be expressed equally in both sexes
D)centromere genes; so that all cells will be able to attach to the spindle
E)centromere genes; so they will be expressed equally in both sexes

Question

Quizplus · Accepted Answer

The genes on the X chromosome that escape inactivation are also present on the Y chromosome. This is because in males, who have only one X chromosome, these genes need to be expressed for proper development and function. This suggests that the reason these genes remain active on one X chromosome in females is due to their importance for normal cellular function.

There Are Genes on the X Chromosome That Manage to Escape