Answer: Nondisjunction means that a pair of homologous chromosomes has failed to separate or segregate at anaphase so that both chromosomes of the pair pass to the same daughter cell. This probably occurs most commonly in meiosis, but it may occur in mitosis to produce a mosaic individual.
Asexual reproduction means that the cell has "cloned" itself, and will therefore have the same number of chromosomes as its daughter, thus option B is correct.
