Genetic recombination as a result of crossing over occurs more readily in genes

Genetic recombination as a result of crossing over
  occurs more readily in genes
  a. that are on the sex chromosomes.
  b. that are on the autosomes.
  c. that are located close together on the same
  chromosome.
  d. that are located far apart on the same
  chromosome.
  e. that are located on different chromosomes.

Question 2

Genes that are located on the same chromosome
  a. tend to be inherited together.
  b. will usually appear together in the gamete.
  c. are said to be linked.
  d. may be separated during crossing over.
  e. are all of these.