NEET · Biology · STD 12 - 1. sexual reproduction in flowering plants
Which one of the following is a triploid cell ?
- A Synergid
- B Central cell
- C Zygote
- D Primary endosperm cell
Answer & Solution
Correct Answer
(D) Primary endosperm cell
Step-by-step Solution
Detailed explanation
(D) Primary endosperm cell
Synergids are haploid \((n)\) cells present in the embryo sac.
The central cell contains two polar nuclei \((n+n)\) which fuse to form a diploid secondary nucleus \((2n)\).
The zygote is a diploid \((2n)\) cell formed by the fusion of a male gamete \((n)\) with the egg cell \((n)\)
The primary endosperm cell is formed by the fusion of a male gamete \((n)\) with the two polar nuclei or secondary nucleus \((2 n)\) of the central cell. This process is called triple fusion, resulting in a triploid \((3 n)\) primary endosperm cell.
Synergids are haploid \((n)\) cells present in the embryo sac.
The central cell contains two polar nuclei \((n+n)\) which fuse to form a diploid secondary nucleus \((2n)\).
The zygote is a diploid \((2n)\) cell formed by the fusion of a male gamete \((n)\) with the egg cell \((n)\)
The primary endosperm cell is formed by the fusion of a male gamete \((n)\) with the two polar nuclei or secondary nucleus \((2 n)\) of the central cell. This process is called triple fusion, resulting in a triploid \((3 n)\) primary endosperm cell.
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