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A chromosome in which the centromere lies exactly in the centre, forming two equal arms and a V shape, is classified as which type?
AMetacentric
BTelocentric
CAcrocentric
DSubmetacentric
Answer & Solution
Correct answer: A. Metacentric
1. Chromosomes are classified by where the centromere lies along their length.
2. A central centromere gives two equal arms and a V-shaped chromosome.
3. This type is called metacentric.
4. Submetacentric has a centromere near the centre giving unequal arms and a J or L shape, which rules out option D.
5. So the answer is metacentric, option A.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 18 Genetics "Types of Chromosomes", p.273_
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