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Q. No.\(\alpha\) Thalassemia is controlled by two closely linked genes HBA1 and HBA2. In a man suffering from this disorder both the genes are mutated, but during the process of spermatogenesis normal condition in one of the genes HBA2 is restored. If the sperm fertilises an egg having mutated HBA1 gene then which of the following statements regarding the resulting child would be true?
1.
This child either male or female will not show any symptom of the trait
2.
The child will show the trait only if he is a male
3.
This child will show mild symptom of the trait regardless of the gender
4.
The child will show the trait only if she is a female
Subtopic: Mendelian Disorders: Thalassemia |
56%
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A son to be colourblind
1. Must have colourblind father
2. Must have normal mother and carrier father
3. Must have unaffected parents
4. Can have a carrier mother and normal father
1. Must have colourblind father
2. Must have normal mother and carrier father
3. Must have unaffected parents
4. Can have a carrier mother and normal father
Subtopic: Mendelian Disorders |
79%
From NCERT
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A heterozygous female for sickle cell anaemia (HbAHbs)
| 1. | Transmits the trait to her sons only |
| 2. | Has 50% probability of transmission of the mutant gene to the progeny |
| 3. | Is considered diseased and dies before maturity |
| 4. | Is normal and does not pass the trait for sickle cell anaemia to her progeny |
Subtopic: Mendelian Disorders: Sickle Cell Anemia |
83%
From NCERT
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Recombination frequency
1. Is directly proportional to the distance between the genes
2. Is not useful to prepare the genetic maps
3. Of closely situated genes is very high
4. Is directly proportional to linkage
1. Is directly proportional to the distance between the genes
2. Is not useful to prepare the genetic maps
3. Of closely situated genes is very high
4. Is directly proportional to linkage
Subtopic: Recombination & Gene Mapping |
85%
From NCERT
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In the given pedigree, find out the genotype which is not possible for individual 'F'?
1. Aa
2. XcX
3. AA
4. XhX
1. Aa
2. XcX
3. AA
4. XhX
Subtopic: Pedigree Analysis: Basics | Pedigree Analysis: Problem Solving |
54%
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Subtopic: Non - Disjunction & Aneuploidy |
79%
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%
1. 20%
2. 25%
3. 75%
4. 80%
Subtopic: Mendelian Disorders |
75%
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Gynaecomastia is present in which syndrome?
1. Turner
2. Klinefelter
3. Down
4. None of the above
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
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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Subtopic: Sex Aneuploidy - Turner & Klinefelter Syndrome |
62%
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