Final answer:
Duchenne muscular dystrophy is a progressive weakening of skeletal muscles caused by a lack of the protein dystrophin. Diagnostic labs for DMD may include testing creatine kinase levels, electromyography, and genetic testing.
Step-by-step explanation:
Duchenne muscular dystrophy (DMD) is a progressive weakening of the skeletal muscles. It is caused by a lack of the protein dystrophin, which leads to muscle fiber degradation. Diagnostic labs for Duchenne muscular dystrophy may include testing creatine kinase levels in the blood, electromyography to measure electrical activity in muscles, and genetic testing for DNA abnormalities.