Fertilization occurs when an organism clones itself two gametes come together and chromosomes combine binary fission takes place gametes are produced

the correct answer for the fill in the blank is- Gametes come together and chromosomes combine.

Fertilization is a process in which sex cells ( also called male and female gametes that are haploid) are fused together and form zygote ( diploid) that eventually develops into new organism.

There are two types of fertilization that is internal ( inside the body) and external fertilization ( outside the body).