In Drosophila two noncoding RNAs called roX1 and roX2 are us

In Drosophila, two non-coding RNAs called roX1 and roX2 are used to _____________ double the expression of X chromosomal genes in males inhibit the expression of one X chromosome in females inactivate X chromosomal gene expression in males regulate the replication of sex chromosomes in males and female.

Solution

Option a is correct because male single X chromosome in Drosophila are hypertranscribed about two fold relative to each of the two female X-chromosome .roX1 and roX2 that help to target ,in absence of roX2 ,roX1 is not