What happens during fertilisation in humans after many sperms reach close to the ovum?
Secretions of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida
All sperms except the one nearst to the ovum lose their tails
Cells of corona radiata trap all the sperms except one
Only two sperms nearest the ovum penetrate zona pellucida
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 .
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.