Question

Explain the process of fertilisaton in human beings.

Answer 1

Explanation:

The result of human fertilization is the union of the production of zygote cell,or fertilized egg,initiating prenatal development. the process of fertilization involves a sperm fusing with an ovum.

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Answer 2

The process of fertilization in Human Beings.

• The process of fertilization is completed in 5 steps.

1. Approach of sperm to ovum -For the fertilization sperm and ova come to each other .Sperm are motile and reach the ovum with the help of tail movement.The sperm are deposited close to fertilization site in Human Beings .
2. Capacitation and contact -The change in mammalian spermatozoon which make it capable of fertilizing the egg have been called capacitation.
3. Fertilizin-antifertilizin interaction (Sperm Agglutination)- According to it ovum secretes a chemical named fertilizin composed of glycoprotein .Sperm has a protein substance on its surface named antifertilizin .Fertilizin and Antifertilizin react like antigen antibody ,as a result the sperm get attached to ovum surface .it is called Sperm Agglutination.
4. Acrosome reaction and penetration - The acrosome elongates to form an acrosomal tubule.The sperm with acrosomal tubule is called as active sperm.It release hyaluronidase enzyme ,which digest the egg membranes to create a passage for sperm entry.Finally,there is a contact between plasma lemma of both sperm and ovum.
5. Activation of ovum - plasma membrane of sperm fuses  with plasma membrane of secondary oocyte and it shows a cortical reaction.It stimulate the secondary oocyte to complete 2nd meiotic division.female pronucleus and male pronucleus move towards each other and fertilization takes place.