Match List-I with List-II
| List-I | List-II |
|---|---|
| Term | 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)
(A) Diploid — this matches (IV) \( 2n \). A diploid cell has two complete sets of chromosomes, one from each parent; human body cells have 2n = 46.
(B) Aneuploidy — this matches (I) \( 2n-1 \). Aneuploidy is the gain or loss of one or a few chromosomes; 2n − 1 is the loss of one, as in Turner’s syndrome (45, XO).
(C) Haploid — this matches (III) \( n \). A haploid cell has a single set of chromosomes, like the gametes (n = 23 in humans).
(D) Polyploidy — this matches (II) \( 4n \). Polyploidy is an increase in whole sets of chromosomes, which follows a failure of cytokinesis after telophase.