NEET-XII-Physics
Previous Year Paper year:2017
- #142What is the fate of the male gametes
discharged in the synergid?
(1) One fuses with egg other(s) degenerate
(s) in the synergid.
(2) All fuse with the egg.
(3) One fuses with the egg, other(s) fuse(s)
with synergid nucleus.
(4) One fuses with the egg and other fuses
with central cell nuclei.digAnsr: 4Ans : ( 4 )
Sol. In flowering plants, out of the two male
gametes discharged in synergids, one fuses
with the egg and other fuses with the
secondary or definitive nucleus present in
central cell.
Egg (n) + 1st male gamete (n)  Zygote (2n)
+ nd
(2n)
(central cellnuclei)
Secondary nucleus 2 male gamete (n)
PEN (3n)