Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) 16p11.2 deletion syndrome ?
    ### Response:
    16p11.2 deletion syndrome is a disorder caused by a deletion of a small piece of chromosome 16. The deletion occurs near the middle of the chromosome at a location designated p11.2.  People with 16p11.2 deletion syndrome usually have developmental delay and intellectual disability.
    