MCQ practice · SSC Biology Board questions · Chapter 3: Cell Division
Which of the following is a J-shaped chromosome?
Think it through first, then pick an option.
- a Telocentric
- b Submetacentric
- c Metacentric
- d Acrocentric
Answer and explanation
Correct answer: d Acrocentric
In an acrocentric chromosome the centromere is very near the end, so the chromatid is J shaped.
Why the other options are wrong
- a Telocentric: In a telocentric chromosome the centromere is right at the end, so the chromatid is I shaped.
- b Submetacentric: In a submetacentric chromosome the centromere is a bit off the centre, so the chromatid is L shaped.
- c Metacentric: In a metacentric chromosome the centromere is exactly in the middle, so the chromatid is V shaped.
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