Match Column -I with column-II and select the CORRECT option from the codes given below .
`{:("Column - I","Column - II"),("(P) Autopolypoidy",(i)2n+1),("(Q) Trisomy",(ii)"AAAA"),("(R) Allopolyploidy",(iii) "AABB"),("(S) Nullisomy",(iv) 2n-2):}`

Options

A. P-(ii), Q-(i), R-(iii), S-(iv)
B. P-(iv), Q-(i), R-(ii), S-(iii)
C. P-(ii), Q-(iv), R-(iii), S-(i)
D. P-(ii), Q-(i), R-(iv), S-(iii)

Answer

To solve the question of matching Column-I with Column-II, we will analyze each term in Column-I and find its correct match in Column-II.

### Step 1: Analyze Autopolyploidy (P)
- **Definition**: Autopolyploidy refers to a condition where an organism has more than two sets of chromosomes that are all from the same species.
- **Match**: This condition is represented as "AAAA" or "2n" where n is the number of chromosomes. Since it involves multiple sets of the same genome, it can be represented as 4n (for example, 4 sets of chromosomes).
- **Conclusion**: Match (P) Autopolyploidy with (ii) "AAAA".

### Step 2: Analyze Trisomy (Q)
- **Definition**: Trisomy is a chromosomal disorder where there is one extra chromosome, leading to a total of 47 chromosomes instead of the normal 46.
- **Match**: This can be represented as "2n + 1", where n is the haploid number of chromosomes. For humans, n = 23, so 2n = 46 and 2n + 1 = 47.
- **Conclusion**: Match (Q) Trisomy with (i) 2n + 1.

### Step 3: Analyze Allopolyploidy (R)
- **Definition**: Allopolyploidy refers to a condition where an organism has more than two sets of chromosomes derived from different species.
- **Match**: This condition is represented as "AABB", indicating two different sets of chromosomes from two different species.
- **Conclusion**: Match (R) Allopolyploidy with (iii) "AABB".

### Step 4: Analyze Nullisomy (S)
- **Definition**: Nullisomy is a condition where a complete pair of homologous chromosomes is missing, resulting in a loss of two chromosomes.
- **Match**: This can be represented as "2n - 2", where two chromosomes are absent from the normal diploid set.
- **Conclusion**: Match (S) Nullisomy with (iv) 2n - 2.

### Final Matches
- (P) Autopolyploidy → (ii) "AAAA"
- (Q) Trisomy → (i) 2n + 1
- (R) Allopolyploidy → (iii) "AABB"
- (S) Nullisomy → (iv) 2n - 2

### Summary of Correct Matches
- P → ii
- Q → i
- R → iii
- S → iv