Which of the Following Is a Mechanism That Can Compensate

Multiple Choice

Which of the following is a mechanism that can compensate for an abnormal number of sex chromosomes in an individual? 1.Each X-linked gene could work twice as hard in males as it does in females
2) One copy of each X-linked gene could be inactivated in females
3) Each X-linked gene could work half as hard in females as it does in males

A) 1
B) 2
C) 3
D) 1 and 3
E) All of these