Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the genetic changes related to Duchenne and Becker muscular dystrophy ?
    ### Response:
    Mutations in the DMD gene cause the Duchenne and Becker forms of muscular dystrophy. The DMD gene provides instructions for making a protein called dystrophin. This protein is located primarily in skeletal and cardiac muscle, where it helps stabilize and protect muscle fibers.
    