Karyotype of Down syndrome has how many chromosomes?
1. 43
2. 46
3. 47
4. 45

Subtopic:  Non - Disjunction & Aneuploidy |
 80%
From NCERT
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A normal man and a normal woman both have one of their parent albino, if get married then what is the probability of their child  being albino?
1. 20%
2. 25%
3. 75%
4. 80%
Subtopic:  Mendelian Disorders |
 76%
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Gynaecomastia is present in which syndrome?
1. Turner
2. Klinefelter
3. Down
4. None of the above
Subtopic:  Sex Aneuploidy - Turner & Klinefelter Syndrome |
 89%
From NCERT
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Which one of them is odd with respect to human male?
1. Absence of one X-chromosome
2. Addition of one X-chromosome
3. Presence of XY- chromosome
4. Absence of Barr body
Subtopic:  Sex Determination |
From NCERT
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XYY → composition
1. Super female
2. Hermaphrodite
3. Male
4. Supermale
Subtopic:  Sex Aneuploidy - Turner & Klinefelter Syndrome |
 64%
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Non-disjunction in meiosis results in:
1. trisomy
2. normal diploid
3. gene mutation
4. None of these
Subtopic:  Non - Disjunction & Aneuploidy |
 77%
From NCERT
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AB blood group shows:
1. Codominance
2. incomplete dominance
3. polygenic inheritance
4. pleiotropy
Subtopic:  Monohybrid Cross: Further Understanding |
 91%
From NCERT
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Gynaecomastia is present in which syndrome?
1. Turner
2. Klinefelter
3. Down
4. None
Subtopic:  Sex Aneuploidy - Turner & Klinefelter Syndrome |
 88%
From NCERT
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Which trait is shown by given pedigree analysis?

1. Autosomal dominant
2. X-Linked dominant
3. Autosomal recessive
4. X-Linked recessive
Subtopic:  Pedigree Analysis: Problem Solving | Pedigree Analysis: More Examples |
 63%
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AB blood group shows :
1. Co-dominance
2, Incomplete dominance
3. Polygenic inheritance
4. Pleiotropy
Subtopic:  Co-dominance |
 91%
From NCERT
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