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  • What is a centromere? How does the position of centromere form the basis of classification of chromosomes. Support your answer with a diagram showing the position of centromere on different types of chromosomes.

14. What is a centromere? How does the position of the centromere form the basis of the classification of chromosomes? Support your answer with a diagram showing the position of the centromere on different types of chromosomes.

Answers (1)

A centromere refers to a non-stainable area that attaches two chromatids of a chromosome. Chromosomes are divided into four types based on the position of the centromere can be of the following types:

1. Acrocentric chromosomes

 Centromere is present in sub-terminal regions, and chromatids are arranged in J-shaped. One arm is extremely long and the other is extremely short.

2. Metacentric chromosome

Centromere is present in the centre and the chromosome appears V-shaped. 

 

3. Sub-metacentric chromosome

The position of the centromere is sub-median. It appears L-shaped. One arm is slightly longer than the other.

4. Telocentric chromosome

The centromere is terminally placed. Chromosome appears I-shaped. 

 

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Sonika

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