Hybrid inviability and hybrid sterility are reproductive isolating mechanisms that are termed:a. ...

Hybrid inviability and hybrid sterility are reproductive isolating mechanisms that are termed:a.
   homozygotic barriers.
  b. prezygotic barriers.
  c. heterozygotic barriers.
  d. postzygotic barriers.
  e. homozygotic barriers.

Question 2

Hybrid sterility is NOT common when:a.
   the gametes of an interspecific hybrid are abnormal.
  b. the two parental species have different chromosome numbers.
  c. chromosomal synapsis during meiosis cannot occur properly.
  d. chromosomal segregation during meiosis cannot occur properly.
  e. there are prezygotic barriers.