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Q. No.The frequency of the recessive allele for a trait is recorded to be 0.25 [Assume only two alleles for the gen and complete dominance]. What would the expected frequency of the heterozygotes in this population?
1. 0.0625
2. 0.5625
3. 0.375
4. 0.1875
Subtopic: Hugo De Vries Theory of Evolution |
69%
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Hugo de Vries believed that:
| 1. | discontinuous variations due to mutations are important for evolution |
| 2. | continuous variations due to recombination are important for evolution |
| 3. | evolution is a function of time |
| 4. | evolution is a deterministic process |
Subtopic: Hugo De Vries Theory of Evolution |
79%
From NCERT
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It is possible that Darwin was influenced by the essay on populations by:
| 1. | Carl Correns | 2. | Charles Lyell |
| 3. | Thomas Malthus | 4. | A. R. Wallace |
Subtopic: Modern Theory of Evolution |
84%
From NCERT
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Consider the given two facts:
What inference(s) can be definitely drawn from the given facts?
A. there had been competition for resources
B. the best adapted survive the competition
1. Only A
2. Only B
3. Both A and B
4. Neither A nor B
| I: | Theoretically, population size will grow exponentially if everybody reproduced maximally |
| II: | Population sizes in reality are limited |
A. there had been competition for resources
B. the best adapted survive the competition
1. Only A
2. Only B
3. Both A and B
4. Neither A nor B
Subtopic: Population Genetics |
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“Giraffes, in an attempt to forage leaves on tall trees, had to adapt by elongation of their necks and they passed on this acquired character of elongated neck to succeeding generations” – this explanation of long necks can best be ascribed to:
| 1. | Charles Darwin | 2. | Lamarck |
| 3. | Hugo de Vries | 4. | Louis Pasteur |
Subtopic: Theory of Evolution & Lamarckism |
94%
From NCERT
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Consider the given two statements:
| Assertion (A): | Natural selection can be regarded as ‘differential reproduction’. |
| Reason (R): | Nature selects for fitness. |
| 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: Natural Selection |
From NCERT
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Within the Australian continent marsupials have undergone:
| 1. | disruptive selection |
| 2. | adaptive radiation |
| 3. | extinction |
| 4. | rapid speciation due to sudden large scale mutations |
Subtopic: Genetic Basis of Adaptation |
94%
From NCERT
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Evolution by anthropogenic action:
| 1. | is a determinist process. |
| 2. | only leads to evolution of species that are useful to humans. |
| 3. | usually is faster than the natural process. |
| 4. | is not at all related to mutations |
Subtopic: Palentological Evidences of Evolution |
61%
From NCERT
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Consider the given two statements
| Assertion (A): | Dark melanic peppered moth survive better in polluted environments. |
| Reason (R): | In polluted areas, dark melanic moths are able to camouflage themselves. |
| 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: Palentological Evidences of Evolution |
94%
From NCERT
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Consider the given two statements:
| Assertion(A): | Homology implies divergent evolution. |
| Reason(R): | Homologous organs are organs which do similar jobs in two taxa that were not present in their most recent common ancestor but rather evolved separately. |
| 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: Palentological Evidences of Evolution |
78%
From NCERT
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