In the section "Investigating Life: Did a Myosin Gene Mutation Make Humans Brainier?",how does an inactive gene that encodes a non-functional myosin protein affect human chewing muscles?

Question

Quizplus · Accepted Answer

The loss of the myosin gene results in the loss of a functional myosin protein, which leads to smaller and weaker chewing muscles. This is because myosin is necessary for muscle contraction, so the loss of this protein would affect muscle function. The other answer choices are incorrect because having many closely related myosin genes does not negate the effects of losing one, myosin is essential for life (as it is necessary for muscle function), other proteins cannot do exactly the same thing as myosin, and there is no information suggesting that the loss of this myosin causes greater flexibility of chewing muscles.

In the Section "Investigating Life: Did a Myosin Gene Mutation