First slide

Double Fertilisation

Question

What is the fate of the male gametes discharged in the synergid?

Easy

A

All fuse with the egg
B

One fuses with the egg, other(s) fuse(s) with synergid nucleus
C

One fuses with the egg and other fuses with central cell nuclei
D

One fuses with the egg, other(s) degenerate(s) in the synergid

Solution

Out of the male gametes discharged in the synergid, one fuses with the egg and other fuses with central cell nuclei. The fusion between male gamete and egg is called syngamy or true fertilisation which forms zygote (2n). The fusion between male gamete and central cell nuclei is called triple fusion and it results in the formation of a triploid primary endosperm nucleus (3n).

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