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Q. No.Males have one X and one Y chromosome in:
I: Humans
II: Grasshoppers
III: Birds
IV: Fruit fly
1. Only I and II
2. Only I and IV
3. Only II and III
4. Only II and IV
Subtopic: Pedigree Analysis: Basics |
85%
Level 1: 80%+
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Consider the given two statements:
| Assertion (A): | Male honeybees do not have father and thus cannot have sons, but have a grandfather and can have grandsons. |
| Reason (R): | Male honeybees produce sperms by mitosis. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 3. | (A) is True but (R) is False |
| 4. | (A) is False but (R) is True |
Subtopic: Sex Determination: Further Considerations |
54%
Level 3: 35%-60%
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Consider the given two statements:
| Assertion (A): | A sex linked recessive disorders is expected to be more common in males than in females. |
| Reason (R): | Males are hemizygous for sex chromosomes. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 3. | (A) is True but (R) is False |
| 4. | (A) is False but (R) is True |
Subtopic: Sex Linked Recessive Inheritance |
70%
Level 2: 60%+
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What is not true regarding Phenylketonuria?
| 1. | It is an inborn error of metabolism. |
| 2. | It is inherited as an autosomal recessive trait. |
| 3. | The affected individual lacks an enzyme that converts the amino acid tyrosine into phenylalanine. |
| 4. | Accumulation of phenylpyruvic acid in brain results in mental retardation. |
Subtopic: Mendelian Disorders |
82%
Level 1: 80%+
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Consider the two statements:
| Statement I: | Thalassemia is a qualitative problem of synthesising an incorrectly functioning globin. |
| Statement II: | Sickle cell anaemia is a quantitative problem of synthesising too few globin molecules. |
1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Mendelian Disorders: Thalassemia |
82%
Level 1: 80%+
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Turner’s Syndrome:
| I: | is an aneuploidy |
| II: | causes infertility in affected females |
| III: | does not affect the development of secondary sexual characters in affected females |
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Sex Aneuploidy - Turner & Klinefelter Syndrome |
82%
Level 1: 80%+
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The cause of Klinefelter's syndrome in humans is :
1. Absence of Y-chromosome
2. Absence of X-chromosome
3. Extra copy of an autosome
4. Extra copy of an X-chromosome
1. Absence of Y-chromosome
2. Absence of X-chromosome
3. Extra copy of an autosome
4. Extra copy of an X-chromosome
Subtopic: Sex Aneuploidy - Turner & Klinefelter Syndrome |
83%
Level 1: 80%+
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Select the incorrect pair :
| 1. | Polygenic inheritance | Haemophilia |
| 2. | Linkage | Drosophila |
| 3. | Incomplete dominance | Antirrhinum |
| 4. | Pleiotropy | Phenylketonuria |
Subtopic: Polygenic Inheritance & Pleiotropy | Chromosomal Basis of Inheritance: Introduction | Linkage | Mendelian Disorders: Hemophilia |
83%
Level 1: 80%+
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According to Mendel, the nature of the unit factors that control the expression of traits were :
1. Stable
2. Blending
3. Stable and discrete
4. Discrete
1. Stable
2. Blending
3. Stable and discrete
4. Discrete
Subtopic: Chromosomal Basis of Inheritance: Introduction | Chromosomal Basis of Inheritance: Further Considerations |
82%
Level 1: 80%+
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Which of the following animals exhibit male heterogamety?
(i) Fruit fly
(ii) Fowl
(iii) Human
(iv) Honey bee
1. (i) and (iii)
2. (ii) and (iv)
3. (ii) and (iii)
4. (i) and (iv)
(i) Fruit fly
(ii) Fowl
(iii) Human
(iv) Honey bee
1. (i) and (iii)
2. (ii) and (iv)
3. (ii) and (iii)
4. (i) and (iv)
Subtopic: Sex Determination |
81%
Level 1: 80%+
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