After double fertilisation, embryo sac/ ovule comes to have
A
1 haploid and 1 triploid cell
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B
1 diploid and 1 triploid cell
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C
2 haploid and 1 triploid cell
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D
1 diploid and 1 haploid cell
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Solution
The correct option is B1 diploid and 1 triploid cell Embryo sac after double fertilisation
After double fertilisation, the embryo sac or ovule consists of a diploid zygote and a triploid primary endosperm nucleus.
One of the two male gametes released from the pollen tube fertilises the egg cell to produce a diploid zygote. It develops into the embryo.
Another male gamete fertilises the diploid central cell (containing the secondary nucleus formed due to fusion of polar nuclei) of the embryo sac to produce a triploid primary endosperm cell (PEC). PEC contains the primary endosperm nucleus (PEN) which divides and develops into the endosperm.
The synergids and antipodal cells disintegrate after fertilisation.