How Did the Inactivation of a Gene That Now Encodes

Multiple Choice

How did the inactivation of a gene that now encodes a nonfunctional myosin protein affect human chewing muscles?

A) No effect because humans have over 40 closely related myosin genes.
B) No effect because myosin is not essential for life.
C) The loss of this myosin causes smaller and weaker chewing muscles in humans.
D) No effect because other proteins in the body can do the same thing as myosin.
E) The loss of this myosin causes greater flexibility of chewing muscles in humans.