The process in which union of male and female gametes (formed by gametogenesis) and fusion of pronuclei of sperm and egg (ovum) takes place is called fertilization. The resultant product of fertilization is called zygote
Complete answer:When a male gamete, which in the case of humans is a sperm cell, fuses with a female egg cell, ovum in case of humans, it leads to the formation of a zygote, and this process is called fertilization.
