Fact 1: Gametes then unite in fertilization and form a diploid zygote.

Fact 2: Mitosis produces diploid cells.

Given the two facts above, answer the question "Mitosis begins when what unite in fertilization? " with the following options: 
- seeds
 - gonads
 - alleles
 - plants
 - cells
 - gametes
 - zygotes
 - Flowers


 

      gametes   