Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the genetic changes related to achondrogenesis ?
    ### Response:
    Mutations in the TRIP11, SLC26A2, and COL2A1 genes cause achondrogenesis type 1A, type 1B, and type 2, respectively.  The genetic cause of achondrogenesis type 1A was unknown until recently, when researchers discovered that the condition can result from mutations in the TRIP11 gene.
    