If a single nondisjunction occurs during anaphase II of meiosis in a normal male cell from meiosis ...

If a single nondisjunction occurs during
  anaphase II of meiosis in a normal male cell
  from meiosis I, of the resulting sperm,
 
  a. three would be normal and one would have
  an extra chromosome.
  b. two would be normal, one would have an
  extra chromosome, and one would be
  missing a chromosome.
  c. two would have an extra chromosome and
  two would be missing a chromosome.
  d. all four sperm would have an extra
  chromosome.
  e. three would have an extra chromosome and
  one would be normal

Question 2

If a 1n egg is fertilized by a n-l sperm, the
  resulting zygote will have
 
  a. the chromosome number 2n1.
  b. a chromosome without its homologue.
  c. a condition called monosomy.
  d. a genetic disorder.
  e. all of these conditions