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Q. No.
Assertion (A):
Pure lines breed true.
Reason (R):
Pure lines are heterozygous for the trait.
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: Introduction to Genetics: 1 |
88%
From NCERT
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Genes A, B, C, and D are linked. The distances between the genes are:
What is the order of the genes on the chromosome?
1. D B A C
2. D B C A
2. D C B A
4. A B C D
| Relationship | Map Unit |
| D – A | 11 |
| D – B | 7 |
| D – C | 22 |
| B – C | 15 |
| A – B | 4 |
1. D B A C
2. D B C A
2. D C B A
4. A B C D
Subtopic: Recombination Gene Mapping |
93%
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A woman whose father was colorblind marries a normal man. What are the chances that their son would have colorblindness?
1. 0%
2. 25%
3. 50%
4. 100%
1. 0%
2. 25%
3. 50%
4. 100%
Subtopic: Mendelian Disorders |
73%
From NCERT
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A change in chromosome number, where the changed number is not an exact multiple of the base number N, is called as:
| 1. | Polyteny | 2. | Aneuploidy |
| 3. | Polyploidy | 4. | Euploidy |
Subtopic: Non - Disjunction & Aneuploidy | Chromosomal Disorders |
82%
From NCERT
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Consider the given two statements.
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.
| Statement I: | It is not necessary that the dominant allele will be the most common allele in a population. |
| Statement II: | Dominance is not an autonomous feature of an allele. |
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 |
80%
From NCERT
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Which of the following best explains a frequency of recombination of 50% in a dihybrid test cross?
| 1. | The two genes are likely to be located on different chromosomes. |
| 2. | All of the offspring have combinations of traits that match one of the two parents. |
| 3. | The genes are located on sex chromosomes. |
| 4. | Abnormal meiosis has occurred. |
Subtopic: Linkage | Recombination Gene Mapping | Recombination & Gene Mapping |
59%
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Consider the given two statements:
| Assertion (A): | Scientifically, it is correct to say that the sex of the baby is determined by the father and not by the mother in humans. |
| Reason (R): | In humans, the males are homogametic but the females are heterogametic. |
| 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 True |
Subtopic: Sex Determination |
93%
From NCERT
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Consider the given two statements:
| Statement I: | Bateson and Punnett gave the chromosomal theory of inheritance. |
| Statement II: | de Vries, Correns and Tschermak rediscovered Mendel’s laws. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is incorrect; Statement II is correct |
| 3. | Statement I is correct; Statement II is incorrect |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Chromosomal Basis of Inheritance: Introduction |
91%
From NCERT
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What type of characters can easily be studied in the pedigree analysis in human beings?
| 1. | quantitative trait | 2. | Mendelian trait |
| 3. | polygenic trait | 4. | maternal trait |
Subtopic: Pedigree Analysis: Problem Solving | Pedigree Analysis: More Examples |
87%
From NCERT
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Which of the following will have an odd number of chromosomes in its somatic cells?
1. male grasshopper
2. female grasshopper
3. male honeybees
4. female honeybees
1. male grasshopper
2. female grasshopper
3. male honeybees
4. female honeybees
Subtopic: Sex Determination |
63%
From NCERT
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