Donor cells in conjugation are labeled ____, whereas recipient cells are labeled ____.

Donor cells in conjugation are labeled ____, whereas recipient cells are labeled ____.
 
  a. F+ cells; F- cells
  b. F+ cells; F+ cells
  c. F- cells; F+ cells
  d. F1 cells; F2 cells
  e. F+ cells; F2 cells

Question 2

Which statement is true?
 
  a. Environmental factors can affect gene expression, which will always affect the genotype.
 b. Environmental factors can affect gene expression, which will affect the phenotype.
 c. Environmental factors never affect gene expression, which will never affect the phenotype.
 d. None of these choices.
 e. Environmental factors can affect gene expression, which will never affect the genotype.