Class 10 Exam > Class 10 Questions > "Barr body" is derived from :-a)aut...
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"Barr body" is derived from :-
- a)autosomes in males
- b)autosomes in females
- c)X-chromosome in female
- d)X-chromosome in males
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
"Barr body" is derived from :-a)autosomes in malesb)autosome...
The Barr body, also sometimes called the sex chromatin, is the inactive X chromosome in female somatic cells. Human females have two X chromosomes, while males have one X and one Y. In all of the female somatic cells, which don’t take part in sexual reproduction, one of the X chromosomes is active.
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"Barr body" is derived from :-a)autosomes in malesb)autosome...
Understanding Barr Bodies
Barr bodies are an important concept in genetics, specifically concerning the X-chromosome. They play a crucial role in the dosage compensation mechanism in females.
What is a Barr Body?
- A Barr body is an inactive X-chromosome found in the somatic cells of females.
- It is a compacted form of one of the two X-chromosomes present in female mammals.
Why are Barr Bodies Formed?
- In females (XX), both X-chromosomes have the potential to express genes.
- To prevent an overexpression of X-linked genes, one X-chromosome is randomly inactivated in each cell during early embryonic development.
- This process is known as X-inactivation.
Significance of Barr Bodies
- The inactivated X-chromosome condenses into the Barr body, which is not transcribed.
- This ensures that females have a similar dosage of X-linked genes as males (XY), who have only one X-chromosome.
Correct Answer Explanation
- The correct answer to the question is option C: X-chromosome in female.
- Barr bodies are derived exclusively from the X-chromosomes in females since males have only one X-chromosome, which cannot form a Barr body.
Conclusion
- Understanding the formation and function of Barr bodies is essential in the study of genetics, particularly in relation to sex-linked traits and disorders.
- The presence of Barr bodies indicates the random X-inactivation process that is vital for gene regulation in female mammals.
Barr bodies are an important concept in genetics, specifically concerning the X-chromosome. They play a crucial role in the dosage compensation mechanism in females.
What is a Barr Body?
- A Barr body is an inactive X-chromosome found in the somatic cells of females.
- It is a compacted form of one of the two X-chromosomes present in female mammals.
Why are Barr Bodies Formed?
- In females (XX), both X-chromosomes have the potential to express genes.
- To prevent an overexpression of X-linked genes, one X-chromosome is randomly inactivated in each cell during early embryonic development.
- This process is known as X-inactivation.
Significance of Barr Bodies
- The inactivated X-chromosome condenses into the Barr body, which is not transcribed.
- This ensures that females have a similar dosage of X-linked genes as males (XY), who have only one X-chromosome.
Correct Answer Explanation
- The correct answer to the question is option C: X-chromosome in female.
- Barr bodies are derived exclusively from the X-chromosomes in females since males have only one X-chromosome, which cannot form a Barr body.
Conclusion
- Understanding the formation and function of Barr bodies is essential in the study of genetics, particularly in relation to sex-linked traits and disorders.
- The presence of Barr bodies indicates the random X-inactivation process that is vital for gene regulation in female mammals.
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"Barr body" is derived from :-a)autosomes in malesb)autosomes in femalesc)X-chromosome in femaled)X-chromosome in malesCorrect answer is option 'C'. Can you explain this answer?
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"Barr body" is derived from :-a)autosomes in malesb)autosomes in femalesc)X-chromosome in femaled)X-chromosome in malesCorrect answer is option 'C'. Can you explain this answer? for Class 10 2025 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about "Barr body" is derived from :-a)autosomes in malesb)autosomes in femalesc)X-chromosome in femaled)X-chromosome in malesCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 10 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for "Barr body" is derived from :-a)autosomes in malesb)autosomes in femalesc)X-chromosome in femaled)X-chromosome in malesCorrect answer is option 'C'. Can you explain this answer?.
"Barr body" is derived from :-a)autosomes in malesb)autosomes in femalesc)X-chromosome in femaled)X-chromosome in malesCorrect answer is option 'C'. Can you explain this answer? for Class 10 2025 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about "Barr body" is derived from :-a)autosomes in malesb)autosomes in femalesc)X-chromosome in femaled)X-chromosome in malesCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 10 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for "Barr body" is derived from :-a)autosomes in malesb)autosomes in femalesc)X-chromosome in femaled)X-chromosome in malesCorrect answer is option 'C'. Can you explain this answer?.
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