Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of 15q11.2 microdeletion ?
    ### Response:
    What are the signs and symptoms of 15q11.2 microdeletion? The signs and symptoms in people with a 15q11.2 microdeletion can vary widely. Some people with the microdeletion don't have any apparent features, while others are more severely affected. When not all people with a genetic abnormality are affected, the condition is said to have reduced penetrance.
    