During fertilization a single sperm joins with an ovum. The nuclei of both cells join together to create one cell. What is that new cell called?
A cell that is formed when an egg and a sperm combine is called as a zygote.
The genome of the zygote is a combination of the DNA in each gamete. It contains the genetic information necessary to form a new individual.
The process of fusion of the male and female gametes is known as fertilisation.