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The chromosomes in which centromere is situated close to one end are: [2015 RS]
- a)Acrocentric
- b)Telocentric
- c)Sub-metacentric
- d)Metacentric
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
The chromosomes in which centromere is situated close to one end are: ...
(a) In acrocentric chromosomes, one arm is very short but another is long.
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The chromosomes in which centromere is situated close to one end are: ...
Acrocentric chromosomes:
- The centromere is located closer to one end of the chromosome.
- The shorter arm of the chromosome is called the "p arm", while the longer arm is called the "q arm".
- The p arm is usually very short and may not contain any genes.
- The q arm is usually much longer and contains most of the genetic material.
- Acrocentric chromosomes are common in humans and other organisms.
- Examples of acrocentric chromosomes in humans include chromosomes 13, 14, 15, 21, and 22.
Other types of chromosomes:
- Telocentric chromosomes: The centromere is located at one end of the chromosome, but the other end is not visible under a microscope.
- Sub-metacentric chromosomes: The centromere is located closer to the middle of the chromosome, resulting in two arms of different lengths.
- Metacentric chromosomes: The centromere is located in the middle of the chromosome, resulting in two arms of equal length.
Explanation:
- The question asks for the type of chromosomes in which the centromere is situated close to one end.
- This describes acrocentric chromosomes, which have the centromere located closer to the p arm end of the chromosome.
- Telocentric chromosomes have the centromere at one end, but the other end is not visible under a microscope.
- Sub-metacentric and metacentric chromosomes have the centromere located closer to the middle of the chromosome.
- Therefore, option A, acrocentric, is the correct answer.
- The centromere is located closer to one end of the chromosome.
- The shorter arm of the chromosome is called the "p arm", while the longer arm is called the "q arm".
- The p arm is usually very short and may not contain any genes.
- The q arm is usually much longer and contains most of the genetic material.
- Acrocentric chromosomes are common in humans and other organisms.
- Examples of acrocentric chromosomes in humans include chromosomes 13, 14, 15, 21, and 22.
Other types of chromosomes:
- Telocentric chromosomes: The centromere is located at one end of the chromosome, but the other end is not visible under a microscope.
- Sub-metacentric chromosomes: The centromere is located closer to the middle of the chromosome, resulting in two arms of different lengths.
- Metacentric chromosomes: The centromere is located in the middle of the chromosome, resulting in two arms of equal length.
Explanation:
- The question asks for the type of chromosomes in which the centromere is situated close to one end.
- This describes acrocentric chromosomes, which have the centromere located closer to the p arm end of the chromosome.
- Telocentric chromosomes have the centromere at one end, but the other end is not visible under a microscope.
- Sub-metacentric and metacentric chromosomes have the centromere located closer to the middle of the chromosome.
- Therefore, option A, acrocentric, is the correct answer.
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Community Answer
The chromosomes in which centromere is situated close to one end are: ...
Centromere is a part of a chromosome that attaches to the spindle during cell division. The position of the centromere is a distinguishing feature of individual chromosomes. A chromosome with the centromere at its centre is described as metacentric.
•one with the centromere close to one end is acrocentric; and a chromosome with terminal centromere is telocentric. The centromere usually appears as a constriction when chromosomes contract during cell division.
•one with the centromere close to one end is acrocentric; and a chromosome with terminal centromere is telocentric. The centromere usually appears as a constriction when chromosomes contract during cell division.
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The chromosomes in which centromere is situated close to one end are: [2015 RS]a)Acrocentricb)Telocentricc)Sub-metacentricd)MetacentricCorrect answer is option 'A'. Can you explain this answer?
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