Zoology - Human Reproduction Question with Solution | TestHub

Process of Fertilisation :

I. Entry of a sperm induces changes in the zona pellucida layer of the ovum and blocks the entry of other sperms preventing polyspermy.

II. Acrosomal secretions (including enzymes) help the sperm to enter into the cytoplasm of the ovum through the zona pellucida.

III. Secondary oocyte undergoes completion of meiosis -II, resulting in formation of a ovum (n) and a Second polar body (n).

IV. Nuclei of both gametes fuse to form a zygote.