Question

Explain double fertilisation?

Answer 1

Hello Friend


Doubke fertilisation is the fusion of two male gamates with the egg and polar nuclei.

Generally the pollen tube carries two male gamates.One fuses with the egg passing through synergid by filiform aparatus.This process is called syngamy


The other male gamate fuse with the two polar nuclei present in the primary endosperm cell to form primary endosperm nucleus.This process is called triple fusion because three nucleus are involved in fusion.

As two process are occuring so it is called double fertilisation.

☆ Hope it helps
☆ Follow me.

Answer 2

Double fertilization-It is a act of two fusion i.e, syngamy and triple fusion.

• After discharge from pollen tube one of the male gametes fuses with the egg and forms the oospore .This is called true fertilization or syngamy .The oospore is diploid.
• The second male gamete fuses with the secondary nucleus and forms a triploid nucleus called as primary endosperm nucleus.This is called triple fusion.
• Thus there are 2 acts of fusion.This is called double fertilization.