Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) 15q24 microdeletion ?
    ### Response:
    15q24 microdeletion is a chromosomal change in which a small piece of chromosome 15 is deleted in each cell. The deletion occurs on the long (q) arm of the chromosome at a position designated q24.  15q24 microdeletion is associated with mild to moderate intellectual disability and delayed speech development.
    