The mechanism of other dominant mutations such as the one that causes myotonic dystrophy is not yet known.
When the DNA was switched on the mice showed all the symptoms of myotonic dystrophy.
Other more common types of MD are Becker's, myotonic dystrophy, limb-girdle MD, and facioscapulohumeral MD. MD is more common in boys.
Myotonic dystrophy is a progressive disease in which the muscles are weak and slow to relax after contraction.
Myotonic dystrophy (DM), also called dystrophia myotonica, myotonia atrophica, or Steinert disease, is a common form of muscular dystrophy.