please help im crying so much
In mammalian females, the majority of one X chromosome's genes are shut down in a process called X chromosome _____. The inactive X is condensed and afterwards called a _____. Because the shutdown is random in the embryonic cells formed by the time inactivation occurs, all mature mammalian females are a
_____ for the expression of X chromosome genes. The inactivation of one X in the female is thought to balance gene expression between males and females, a theory called _____. The shutdown of the X chromosome is accomplished by the
______ gene. _____ is the master gene for male sex determination in mammals and is found on the human Y-chromosome.
