What is the fate of the male gametes discharged in the synergid?
One fuses with with the egg other(s) degentrate in the synergid
All fuse with the egg
One fuses with the egg, other(s) fuse with the synergid nucleus.
One fuses with with the egg and other fuses with central cell nuclei
Double Fertilisation -
After entering one of the synergids, the pollen tube releases the two male gametes into the cytoplasm of the synergid. One of the male gametes moves towards the egg cell and fuses with its nucleus thus completing the syngamy. This results in the formation of a diploid cell, the zygote.
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Out of the two male gamete that are discharged in the synergid cell via pollen tube one of them fuses with the egg cell to form zygote (2n) and the other one fuses with polar nuclear (central cell nucleus) to form the primary endosperm nucleus (3n)
Option 1)
One fuses with with the egg other(s) degentrate in the synergid
Option 2)
All fuse with the egg
Option 3)
One fuses with the egg, other(s) fuse with the synergid nucleus.
Option 4)
One fuses with with the egg and other fuses with central cell nuclei