0
The X chromosome is inactivated when a (-CH3) gets added to one of the nitrogenous bases of DNA nucleotides.
They changed to inactivated to lower the risk of shedding polio virus after the live vaccine.
Enzymes are permanently inactivated by high temperature extremes. They are denatured.
It is inactivated toxin vaccine (Diptheria, Tetnus) and killed bacteria (Pertrussi)
Since someone with Turner's syndrome is X0 if you inactivated the X chromosome you would kill the person.