Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Ulna hypoplasia with mental retardation ?
    ### Response:
    What are the signs and symptoms of Ulna hypoplasia with mental retardation? The Human Phenotype Ontology provides the following list of signs and symptoms for Ulna hypoplasia with mental retardation. If the information is available, the table below includes how often the symptom is seen in people with this condition.
    