Problem:
Question: Which of the following is not true of X-inactivation?
a. it is necessary for dosage compention
b. it is the cause of calico color in cats
c. the mechanism includes transcription of the xist gene and chromatin remodeling.
D. it is historically called ionization
E. the master regulatory gene for X-inactivation is sxl or sex- lethal
Please select correct answer and also provide explaination.