How Did the Inactivation of a Gene That Now Encodes

question 8

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 led to 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 led to greater flexibility of chewing muscles in humans.

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