Genetic Disorder — Important Questions
CBSE · Class 11 · Biotechnology
74 important questions from Genetic Disorder for CBSE Class 11 Biotechnology, with answers. Part of the CBSE Class 11 Biotechnology syllabus.
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Important Questions from Genetic Disorder
Which process usually causes Down's syndrome?
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Non-disjunction
Down's syndrome usually arises when chromosomes fail to separate properly during cell division. This is called non-disjunction.
Which syndrome affects males and has genotype 47, XXY?
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Klinefelter's syndrome
Klinefelter's syndrome affects males and is caused by an extra X chromosome, giving genotype 47, XXY.
Which karyotype belongs to Klinefelter's syndrome?
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47, XXY
Klinefelter's syndrome has an extra X chromosome in a male, so the karyotype is 47, XXY.
How many Barr bodies are seen in the buccal smear of a person with Klinefelter's syndrome?
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One Barr body
Klinefelter's syndrome has one extra X chromosome, so one Barr body is seen in the buccal smear.
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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