Q49 / 180 · NEET 2026 (Re-NEET) · Botany
If the diploid chromosome number of typical angiosperm is $36$, what would be the chromosome number in its endosperm ?
- A$72$
- B$18$
- C$36$
- Correct answerD$54$
Solution
The diploid chromosome number of the angiosperm is given as $2n = 36$.
The haploid chromosome number is $n = \dfrac{36}{2} = 18$.
In typical angiosperms, the endosperm is formed by the process of triple fusion, where one haploid male gamete fuses with the diploid secondary nucleus (formed by two haploid polar nuclei).
Therefore, the ploidy level of the endosperm is triploid ($3n$).
The chromosome number in the endosperm will be $3n = 3 \times 18 = 54$.
The haploid chromosome number is $n = \dfrac{36}{2} = 18$.
In typical angiosperms, the endosperm is formed by the process of triple fusion, where one haploid male gamete fuses with the diploid secondary nucleus (formed by two haploid polar nuclei).
Therefore, the ploidy level of the endosperm is triploid ($3n$).
The chromosome number in the endosperm will be $3n = 3 \times 18 = 54$.
Hence, the correct answer is option: 'D'.