Sperm comes into contact with the egg, Enzymes released by the acrosome digest the zona pellucida., The sperm binds with the plasma membrane of the egg., Plasma membrane of the sperm fuses with the plasma membrane of the egg., Sperm nucleus enters the egg., Sperm nucleus becomes the male pronucleus., Male pronucleus binds to the female pronucleus to form the diploid nucleus..

Fertilisation

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