A Karyotype Shows That a Child Has Klinefelter Syndrome (47,XXY)

Multiple Choice

A karyotype shows that a child has Klinefelter syndrome (47,XXY) . If the child is also color- blind (due to a recessive X- linked allele) , despite his parents having normal color vision, in which parent and stage of meiosis did nondisjunction occur?

A) father in meiosis I
B) mother in meiosis I or II
C) mother in meiosis II
D) father in meiosis II
E) mother in meiosis I