Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the genetic changes related to Weissenbacher-Zweymller syndrome ?
    ### Response:
    Mutations in the COL11A2 gene cause Weissenbacher-Zweymller syndrome. The COL11A2 gene is one of several genes that provide instructions for the production of type XI collagen. This type of collagen is important for the normal development of bones and other connective tissues that form the body's supportive framework.
    