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Double Fertilization MCQ - Practice Questions with Answers
Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET
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Double Fertilization is considered one of the most asked concept.
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The male gamete moves toward two polar nuclei located in the central cell and fuses with them and produce
The endosperm nucleus is
Filiform apparatus is characteristic feature of:
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In angiosperm, the haploid, diploid, and triploid structures of a fertilized embryo sac sequentially are:
Concepts Covered - 1
Double Fertilization
- 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.
- The other male gamete moves towards the two polar nuclei located in the central cell and fuses with them to produce a triploid primary endosperm nucleus (PEN).
- As this involves the fusion of three haploid nuclei it is termed triple fusion.
- Since two types of fusions, syngamy and triple fusion take place in an embryo sac the phenomenon is termed double fertilisation, an event unique to flowering plants.
- The central cell after triple fusion becomes the primary endosperm cell (PEC) and develops into the endosperm while the zygote develops into an embryo.
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