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Q. No.Consider the given two statements:
Assertion (A):
In incomplete dominance, segregation of unit factors does not take place.
Reason (R):
Incomplete dominance is blending inheritance.
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.
Both (A) and (R) are False.
Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
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Genes assort independently if they are situated on the:
1. heterologous chromosomes
2. homologous chromosomes
3. extra nuclear genetic element
4. same chromosome
1. heterologous chromosomes
2. homologous chromosomes
3. extra nuclear genetic element
4. same chromosome
Subtopic: Chromosomal Basis of Inheritance: Introduction |
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| Assertion (A): | X- linked recessive disorders are more common in the males. |
| Reason (R): | Males with a sex chromosome complement, XY, are heterozygous for X-linked recessive disorders. |
| 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, (R) is False |
| 4. | (A) is False, (R) is False |
Subtopic: Sex Linked Recessive Inheritance |
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Consider the given two statements:
| Statement I: | In incomplete dominance and co-dominance, the F2 phenotypic ratio and genotypic ratio are identical. |
| Statement II: | Incomplete dominance and co-dominance are examples of blending inheritance. |
1. Only Statement I is correct.
2. Only Statement II is correct.
3. Both Statement I and Statement II are correct.
4. Both Statement I and Statement II are incorrect.
Subtopic: Monohybrid Cross: 1 | Co-dominance |
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Unlike Sickle Cell Anemia, Thalassemia is a
1. Only A is correct
2. Only B is correct
3. Both A and B are correct
4. Both A and B are incorrect
| A: | Quantitative Disorder |
| B: | Autosomal Disorder |
2. Only B is correct
3. Both A and B are correct
4. Both A and B are incorrect
Subtopic: Mendelian Disorders: Sickle Cell Anemia | Mendelian Disorders: Thalassemia |
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Starch synthesis in pea seeds is controlled by one gene. What will be true?
| Statement I: | BB homozygotes produce large starch grains, Bb heterozygotes produce large starch grains and bb homozygotes produce smaller starch grains. |
| Statement II: | BB homozygotes produce round seeds, Bb heterozygotes produce oval seeds and bb homozygotes produce wrinkled seeds. |
| 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 incorrect |
| 4. | Statement I is incorrect; Statement II is correct |
Subtopic: Co-dominance |
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Consider the given two statements:
| Assertion (A): | Pedigree analysis is used for the analysis of inheritance of genetic traits in human families. |
| Reason (R): | Choice matings are not possible in humans and the number of progeny are also limited, usually. |
| 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: Pedigree Analysis: Basics |
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Consider the given two statements:
| Assertion (A): | UV radiations can cause mutations in organisms – it is a mutagen. |
| Reason (R): | UV radiations are ionising radiations. |
| 1. | (A) is True but (R) is False |
| 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 False but (R) is True |
Subtopic: Mutation |
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Consider the given two statements:
| Assertion (A): | The underlying mechanism of pleiotropy in most cases is the effect of a gene on metabolic pathways which contribute towards different phenotypes. |
| Reason (R): | Pleiotropy occurs when one gene influences two or more seemingly unrelated phenotypic traits. |
| 1. | (A) is False but (R) is True |
| 2. | (A) is True but (R) is False |
| 3. | Both (A) and (R) are True and (R) is the correct explanation of (A) |
| 4. | Both (A) and (R) are True but (R) is not the correct explanation of (A) |
Subtopic: Polygenic Inheritance & Pleiotropy |
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What is the probability of having a child with a medium skin color in humans if both parents are heterozygous (AaBbCc)?
| 1. | 1/64 | 2. | 6/64 |
| 3. | 15/64 | 4. | 20/64 |
Subtopic: Polygenic Inheritance & Pleiotropy |
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