Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the genetic changes related to fibrodysplasia ossificans progressiva ?
    ### Response:
    Mutations in the ACVR1 gene cause fibrodysplasia ossificans progressiva.  The ACVR1 gene provides instructions for producing a member of a protein family called bone morphogenetic protein (BMP) type I receptors. The ACVR1 protein is found in many tissues of the body including skeletal muscle and cartilage.
    