If fertilization occurs when a male gamete and an egg fuse together to form a diploid zygote, then what is formed when a male gamete and an egg fuse together?

Answer choices:
- Plant reproduction
 - simple zygote
 - spread flower seeds
 - diploid zygote
 - Chemical energy
 - peachleaf willow
 - duplex zygote
 - reproductive zygote

 

    diploid zygote      