What Gene(s) Is/are Encoded in the Xic

Question

What gene(s) is/are encoded in the Xic?
A) Xce
B) Xist
C) Tsix
D) Both the Tsix and Xist are genes are in the Xic region

Accepted Answer

Both the Tsix and Xist are genes are in the Xic region. The Xic region on the X chromosome contains two major genes, Xist and Tsix, that play a critical role in X chromosome inactivation. Xce (X chromosome controlling element) is not a gene, but a genetic element that regulates the choice of which of the two X chromosomes will be silenced in female cells.