A mutation in the ____ gene results in increased muscle mass of whippet dogs.

Question

Quizplus · Accepted Answer

Myostatin is a protein that regulates muscle growth, and a mutation in the myostatin gene can result in decreased myostatin levels and thus increased muscle mass. This mutation has been identified in whippet dogs, resulting in a breed known as "bully whippets" with abnormally high muscle mass. The other choices (BRCA1, BRCA2, CACNA1D, and Down syndrome) are unrelated to muscle mass in dogs.

A Mutation in the ____ Gene Results in Increased Muscle