Maharashtra State Board course SSC (Marathi Semi-English) 9th
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Answer the Following Question in Your Own Word. What is Meant by ‘Chromosome’. Explain Its Types. - Science and Technology

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ConceptMendel’s principles of heredity

Question

Answer the following question in your own word. 

What is meant by ‘chromosome’. Explain its types. 

Solution

Chromosomes are thread-like structures found in the nucleus of all living cells. Chromosomes are divided into four types based on the position of the centromere.

(1) Metacentric chromosomes: In these chromosomes, the centromere is present in the middle, which gives rise to two equal arms.

(2) Sub-metacentric chromosomes: In sub-metacentric chromosomes, the centromere lies slightly away from the middle region. As a result, it has one arm slightly longer than the other.

(3) Acrocentric chromosomes: In acrocentric chromosomes, the centromere is located close to the end of the chromosome. As a result, it has one arm, which is extremely long and the other, which is extremely short.

(4) Telocentric chromosomes: In telocentric chromosomes, the centromere is present at the terminal end. As a result, the chromosome has only one arm.

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APPEARS IN

 Balbharati Solution for Balbharati Class 9 Science and Technology (2019 to Current)
Chapter 16: Heredity and Variation
Exercise | Q: 3.1 | Page no. 193
Solution Answer the Following Question in Your Own Word. What is Meant by ‘Chromosome’. Explain Its Types. Concept: Mendel’s principles of heredity.
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