Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the genetic changes related to 16p11.2 deletion syndrome ?
    ### Response:
    People with 16p11.2 deletion syndrome are missing a sequence of about 600,000 DNA building blocks (base pairs), also written as 600 kilobases (kb), at position p11.2 on chromosome 16. This deletion affects one of the two copies of chromosome 16 in each cell.
    