1. What kind of error in Meiosis could lead to two copies of a single chromosome in a sperm or egg rather than the expected one?
2. Union of a sperm with two copies of chromosome 16 with an egg with the expected one copy will yield a zygote with three copies of chromosome 16. Why is the presence of three copies of chromosome 16 likely to be lethal?
3. If a horse and donkey are mated, the resulting animal (a mule) is diploid but sterile. Why is it sterile?