Gametes then unite in fertilization and form a diploid zygote.
Mitosis produces diploid cells.
Gametes then unite in fertilization and begin mitosis.
Mitosis begins when what unite in fertilization? 

(a) seeds
(b) gonads
(c) alleles
(d) plants
(e) cells
(f) gametes
(g) zygotes
(h) Flowers