A group of genetically transmitted disorders characterized by progressive symmetrical wasting of skeletal muscles; there is no evidence of nerve involvement or degeneration of nerve tissue.

Muscular dystrophy

Explanation:

Muscular dystrophy is a type of heterogeneous neuromuscular and genetic disorder which causes progressive symmetrical wasting of the skeletal muscles.

Although it is a neuromuscular disease, the nerves are not involved and only the muscles are degenerated.

This condition leads to muscle weakness, wasting, and atrophy of especially the skeletal muscles.

This arises due to mutation of the DMD gene or the X-linked chromosome which produces dystrophin.

There are many types like the Duchenne, Becker, myotonic, facioscapulohumeral, congenital, and limb-girdle muscular dystrophies.

The common symptoms are frequent falls; muscle weakness, pain, stiffness; learning disabilities; delayed growth etc.  

It is often associated with heart problems, scoliosis, and obesity.

answer; genes dictate the production of specific enzymes, and affected individuals have genetic defects that cause them to lack certain enzymes;