Final answer:
Nondisjunction during meiosis I can result in gametes with missing or extra copies of a chromosome, while nondisjunction during meiosis II can result in gametes with missing a chromosome, one copy of a chromosome, or an extra copy of a chromosome.
Step-by-step explanation:
If nondisjunction occurs during meiosis I, the resulting gametes will generate two gametes that lack a particular chromosome and two gametes with two copies of the chromosome. On the other hand, if nondisjunction occurs during meiosis II, there will be one gamete that lacks the chromosome, two gametes with one copy of the chromosome, and one gamete with two copies of the chromosome.