Q.59 Match the nuclei status of mutant plant (Column-I) with the typical chromosome number
(Column-II), when the wild type plant species is having 2N = 46 chromosomes.
Column I
P. Trisomic
Q. Triploid
R. Monosomic
S. Monoploid
Column II
1. 23
2. 45
3. 47
4. 69
(A) P-1, Q-2, R-3, S-4
(B) P-2, Q-3, R-4, S-1
(C) P-3, Q-4, R-2, S-1
(D) P-4, Q-3, R-1, S-2
Given Information
Wild type chromosome number:
2N = 46 ⇒ N = 23
Column I: Nuclei Status
- P. Trisomic
- Q. Triploid
- R. Monosomic
- S. Monoploid
Column II: Chromosome Numbers
- 1. 23
- 2. 45
- 3. 47
- 4. 69
Step-by-Step Matching
P. Trisomic
Trisomic condition = 2N + 1
46 + 1 = 47
P → 3
Q. Triploid
Triploid condition = 3N
3 × 23 = 69
Q → 4
R. Monosomic
Monosomic condition = 2N − 1
46 − 1 = 45
R → 2
S. Monoploid
Monoploid condition = N
N = 23
S → 1
Correct Matching Summary
| Nuclei Status | Chromosome Number |
|---|---|
| P. Trisomic | 47 (3) |
| Q. Triploid | 69 (4) |
| R. Monosomic | 45 (2) |
| S. Monoploid | 23 (1) |
Final Answer
Correct combination:
P-3, Q-4, R-2, S-1
Correct option: (C)
Conclusion
By first calculating the haploid chromosome number (N) and then applying the
standard definitions of aneuploidy and polyploidy, the correct chromosome
numbers for each mutant nuclei status can be easily identified. Option (C)
correctly matches all nuclei conditions with their respective chromosome counts.
