(i) Fertilisation is the fusion of a male gamete (sperm) and a female gamete (ovum or egg) to form of zygote during sexual reproduction.
(ii) The type of fertilization that takes place in in humans is internal fertilisation.
(iii) Fertilization occur in the fallopian tubes of the female reproductive system.
(iv) When tha male gamete or sperm reaches the female gamete ova, one of the sperms fuses with the egg leading to fertilization. The nuclei of the sperm and the egg fuse to form a single nucleus. This results in the formation of a fertilized egg or zygote.