An Increase in the Activity of X-Linked Genes in Males,as

Question

An increase in the activity of X-linked genes in males,as is observed in Drosophila,is known as:
A) Hypoactivation
B) Hyperactivation
C) Mosaicisn
D) None of these
E) All of these

Accepted Answer

An increase in the activity of X-linked genes in males is known as Hyperactivation. It is due to the fact that in males, there is only one X chromosome, and thus all genes on the X chromosome are expressed at higher levels compared to females, who have two X chromosomes and undergo X inactivation to balance gene expression. Hypoactivation refers to a decrease in gene activity, Mosaicism refers to the presence of different types of cells with different genetic makeup in an individual, and none of these options correctly describe the observed increase in activity of X-linked genes in males.