Answer
B.
Work Step by Step
Non-disjunction in the second meiotic division would only affect two of the four products of meiosis with aneuploidy, and so if better than having nondisjunction in the first division, which would affect all four product cells (sperm; B.). A says the opposite of this and, so, is false. C. and D. are both wrong because they say that there is no difference between the effects of nondisjunction in the first and second divisions of meiosis.
