In Drosophila,dosage compensation is controlled by the male-specific lethal (MSL)complex consisting of MSL proteins and roX RNAs.Based on what you know about dosage compensation,the role of the MSL complex in males would be to
A)double the level of expression of genes on the X chromosome.
B)increase the level of expression of genes on the X chromosome by 50%.
C)decrease the level of expression of genes on the X chromosome by 50%.
D)decrease the level of expression of genes on the X chromosome by 100%.
E)double the level of expression of genes on the Y chromosome.

Question

Quizplus · Accepted Answer

Dosage compensation ensures that males and females have equal expression of genes on the X chromosome. Since females have two X chromosomes and males have one, the MSL complex in males acts to double the level of expression of genes on the X chromosome to match the level of expression in females.

In Drosophila,dosage Compensation Is Controlled by the Male-Specific Lethal (MSL)complex