Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) FG syndrome ?
    ### Response:
    FG syndrome is a genetic condition that affects many parts of the body and occurs almost exclusively in males. "FG" represents the surname initials of the first family diagnosed with the disorder.  FG syndrome affects intelligence and behavior. Almost everyone with the condition has intellectual disability, which ranges from mild to severe.
    