Problem:
A couple has a son with Klinefelter syndrome, a condition in which an extra copy of the X chromosome is present. This condition also results from nondisjunction. During which meiotic division, and in which parent, could nondisjunction have occurred to produce a child with this condition?
Select all that apply.
a) Meiosis 1 in the mother
b) Meiosis 2 in the mother
c) Meiosis 1 in the father
d) Meiosis 2 in the father