Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Trisomy 2 mosaicism ?
    ### Response:
    Trisomy 2 mosaicism is a rare chromosome condition caused by the presence of an extra copy of chromosome 2 in a subset of a persons cells. Many cases of trisomy 2 mosaicism result in spontaneous abortion or miscarriage during pregnancy. In live born infants, signs and symptoms vary widely but generally include poor growth of the baby while in the womb and multiple birth defects.
    