Answer:
this is an example of a positive acceleration because Paul is speeding up not slowing down
Explanation:
"Males who inherit the mutation get the disease because they have no second dystrophin gene to make up for the faulty one. Early in the embryonic development of a female, either the X chromosome from the mother (maternal X) or the one from the father (paternal X) is inactivated in each cell."
(courtesy https://www.mda.org)
DNA is the long molecule that makes up a chromosome