Mendel's dihybrid crosses, but not his monohybrid crosses, show that

Mendel's dihybrid crosses, but not his monohybrid crosses, show that
  a. some genes are linked together.
  b. the two alleles controlling a trait are divided equally among the gametes.
  c. alleles for different traits are inherited independently.
  d. one of the pair of alleles is dominant to the other.
  e. the crossing of two different homozygous forms will not produce any offspring in the first generation that will
  look like either of the parents.

Question 2

Which offspring in the illustration above are homozygous recessive for both traits?
  a. PPTT
  b. ppTT
  c. PpTt
  d. pptt
  e. PPtt