Match List-I with List-II.
| List-I | List-II | ||
|---|---|---|---|
| (a) | Metacentric chromosome | (i) | Centromere situated close to the end forming one extremely short and one very long arms |
| (b) | Acrocentric chromosome | (ii) | Centromere at the terminal end |
| (c) | Sub-metacentric | (iii) | Centromere in the middle forming two equal arms of chromosomes |
| (d) | Telocentric chromosome | (iv) | Centromere slightly away from the middle forming one shorter arm and one longer arm |
Choose the correct answer from the options given below.
- A
(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
- B
(a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
- C
(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
- D
(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
Classify chromosomes by the position of the centromere.
Metacentric: centromere in the middle, producing two arms of equal length. So (a) maps to (iii).
Acrocentric: centromere close to one end, producing one very short arm and one very long arm. So (b) maps to (i).
Sub-metacentric: centromere slightly off centre, producing one shorter arm and one longer arm. So (c) maps to (iv).
Telocentric: centromere at the terminal end with effectively only one arm. So (d) maps to (ii).
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