You mean Fertilisation. It is the very beginning of an individuals life, when a sperm enters the egg or ovum and the two nuclei unite and the full species chromosome number is restored. The ovum or egg is then said to be fertilised and cell division for growth and differentiation begins.
Egg and sperm fertilization is a zygote fusion process. It is the
basic feature of sexual reproduction, common in animal and plant world, but
people most often mentioned is the animal.
basic feature of sexual reproduction, common in animal and plant world, but
people most often mentioned is the animal.