Q39 / 180 · NEET 2026 (Cancelled) · Botany
Which one of the following is a triploid cell ?
- ASynergid
- BCentral cell
- CZygote
- Correct answerDPrimary endosperm cell
Solution
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 ($2n$) of the central cell. This process is called triple fusion, resulting in a triploid ($3n$) primary endosperm cell.
Answer: Primary endosperm cell
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 ($2n$) of the central cell. This process is called triple fusion, resulting in a triploid ($3n$) primary endosperm cell.
Answer: Primary endosperm cell
Hence, the correct answer is option: 'D'.