Fact 1: Fertilization of gametes produces a diploid zygote.

Fact 2: Sperm and egg nuclei combine to form the diploid zygotic nucleus 2.

Given the two facts above, answer the question "Sperm and egg nuclei combine to do what?" with the following options: 
- combine genes
 - rapid expansion
 - fertilize gametes
 - reproduce
 - allow growth
 - build proteins
 - spread flower seeds
 - remove eggs


 

   fertilize gametes      