Match List-I with List-II
|
List-I Term |
List-II Chromosome formulation |
|
(A) Diploid |
(I) $2n-1$ |
|
(B) Aneuploidy |
(II) $4n$ |
|
(C) Haploid |
(III) $n$ |
|
(D) Polyploidy |
(IV) $2n$ |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (A)-(IV), (B)-(I), (C)-(III), (D)-(II)
|
List-I Term |
List-II Chromosome formulation |
|
(A) Diploid |
(IV) $2n$ |
|
(B) Aneuploidy |
(I) $2n-1$ |
|
(C) Haploid |
(III) $n$ |
|
(D) Polyploidy |
(II) $4n |
(A) Diploid → (IV) 2n
- Diploid organisms have two complete sets of chromosomes (one from each parent). Example: Humans (2n = 46). So, Diploid = 2n.
(B) Aneuploidy → (I) 2n − 1
- Aneuploidy = loss or gain of one or a few chromosomes, not a whole set. Example: Turner’s syndrome (45, X → 2n − 1), Down’s syndrome (47, +21 → 2n + 1). So, Aneuploidy = 2n − 1 (or 2n + 1).
(C) Haploid → (III) n
- Haploid organisms/gametes contain only one set of chromosomes. Example: Human gametes (n = 23). So, Haploid = n.
(D) Polyploidy → (II) 4n
- Polyploidy = more than two complete sets of chromosomes. Common in plants (e.g., wheat is hexaploid, 6n). Example given: 4n (tetraploid). So, Polyploidy = 4n.