What happens during fertilisation in humans after many sperms reach close to the ovum?

  • Option 1)

    Secretions of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida

  • Option 2)

    All sperms except the one nearst to the ovum lose their tails

  • Option 3)

    Cells of corona radiata trap all the sperms except one

  • Option 4)

    Only two sperms nearest the ovum penetrate zona pellucida

 

Answers (1)

As we discussed in concept

Events during Fertilisation -

During fertilisation, a sperm comes in contact with the zona pellucida layer of the ovum and induces changes in the membrane that block the entry of additional sperms.

- wherein

This ensures that only one sperm can fertilise an ovum .

Reproducation

 

 

 


Option 1)

Secretions of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida

This option is correct.

Option 2)

All sperms except the one nearst to the ovum lose their tails

This option is incorrect.

Option 3)

Cells of corona radiata trap all the sperms except one

This option is incorrect.

Option 4)

Only two sperms nearest the ovum penetrate zona pellucida

This option is incorrect.

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