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Q. No.Repeated crosses between two tall plants resulted in all tall offspring. What, most likely, would be the genotypes of both parents?
1. tt X tt
2. Tt and Tt
3. TT and TT
4. Tt and tt
1. tt X tt
2. Tt and Tt
3. TT and TT
4. Tt and tt
Subtopic: Monohybrid Cross: Further Understanding |
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Which of the following was not a character studied by Mendel in garden pea?
| 1. | Flower position | 2. | Pod shape |
| 3. | Flower colour | 4. | Pod position |
Subtopic: Introduction to Genetics: 1 | Introduction to Genetics: 2 | Monohybrid Cross: 1 |
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Consider the given two statements:
| Assertion (A): | Mendel self-pollinated the F2 plants and found that dwarf F2 plants continued to generate dwarf plants in F3 and F4 generations. |
| Reason (R): | The genotype of the dwarfs was homozygous. |
| 1. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 2. | Both (A) and (R) are True and (R) correctly explains Assertion. |
| 3. | Both (A) and (R) are False. |
| 4. | (A) is True but (R) is False. |
Subtopic: Monohybrid Cross: Further Understanding |
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Consider the given two statements:
| Assertion (A): | The strength of linkage between two genes is directly proportional to the distance between them on the chromosome. |
| Reason (R): | Genes that are farther apart are less likely to be separated by recombination. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False, (R) is False. |
Subtopic: Linkage |
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Consider the given two statements:
| Assertion (A): | Although there are three alleles for the ABO blood group types in humans, an individual is expected to carry only two of any such alleles. |
| Reason (R): | To study multiple allelism, the geneticist must study the population and not an individual. |
| 1. | (A) is False but (R) is True. |
| 2. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 3. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 4. | (A) is True but (R) is False. |
Subtopic: Polygenic Inheritance & Pleiotropy |
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In a monohybrid cross, ¼ of the random fertilisations lead to:
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
| I: | Homozygous dominant progeny |
| II: | Homozygous recessive progeny |
| III: | Heterozygous progeny |
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: Monohybrid Cross: Further Understanding |
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Consider the given two statements:
| Assertion (A): | In a Mendelian monohybrid cross, the F2 generation exhibits a phenotypic ratio of 3:1. |
| Reason (R): | This ratio occurs because alleles segregate independently during gamete formation and recombine randomly during fertilization. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Monohybrid Cross: 1 |
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The mode of inheritance of given pedigree is best explained as:
| 1. | Autosomal dominant | 2. | Autosomal recessive |
| 3. | Sex linked dominant | 4. | Sex linked recessive |
Subtopic: Sex Linked Recessive Inheritance |
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Consider the given two statements:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | Gregor Mendel, conducted hybridisation experiments on garden peas for seven years (1856-1863). |
| II: | During Mendel’s investigations into inheritance patterns, it was for the first time that statistical analysis and mathematical logic were applied to problems in biology. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Introduction to Genetics: 1 |
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Identify an autosomal recessive inborn error of metabolism the effects of which can be completely overcome by regulating the diet of the affected individual:
| 1. | Cystic fibrosis | 2. | Huntington’s chorea |
| 3. | Albinism | 4. | Phenylketonuria |
Subtopic: Mendelian Disorders |
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