Q. No.What does Hardy- Weinberg equation p2 + 2pq + q2 = 1 convey that the sum total of all the allelic frequencies is
1. Zero
2. One
3. Less than 1
4. More than 1
1. Zero
2. One
3. Less than 1
4. More than 1
Subtopic: Hardy Weinberg Law |
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The Hardy-Weinberg equilibrium states that allele frequencies in a population remain constant unless acted upon by evolutionary forces. Which of the following does NOT affect Hardy-Weinberg equilibrium?
| 1. | Gene flow |
| 2. | Genetic drift |
| 3. | Natural selection |
| 4. | Law of independent assortment |
Subtopic: Hardy Weinberg Law |
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The Hardy-Weinberg principle is used to:
| 1. | Explain genetic drift in small populations. |
| 2. | Predict the outcome of genetic mutations. |
| 3. | Demonstrate the effects of natural selection. |
| 4. | Describe the conditions under which allele frequencies in a population remain constant. |
Subtopic: Hardy Weinberg Law |
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What is the correct definition of genetic equilibrium?
| 1. | The state in which new alleles constantly appear due to mutation and are balanced by natural selection. |
| 2. | A condition where genetic variation is completely eliminated in a population, leading to a single phenotype. |
| 3. | The condition where the rate of mutations equals the rate of migration in a population. |
| 4. | A state in which allele frequencies in a population remain constant over generations, provided that evolutionary forces like mutation, selection, and gene flow are absent. |
Subtopic: Hardy Weinberg Law |
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Natural selection in which more individuals acquire mean character value is called as:
1. Stabilising
2. Directional
3. Disruptive
4. Retrograde
1. Stabilising
2. Directional
3. Disruptive
4. Retrograde
Subtopic: Hardy Weinberg Law |
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At a particular locus, the frequency of allele A is 0.8 and that of allele a is 0.2. What would be the frequency of heterozygotes in a random mating population at equilibrium?
1. 0.32
2. 0.16
3. 0.24
4. 0.48
1. 0.32
2. 0.16
3. 0.24
4. 0.48
Subtopic: Hardy Weinberg Law |
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Directional natural selection is characterised by a consistent shift in the population’s phenotypic mean because individuals with one extreme phenotype:
| 1. | Are eliminated randomly due to sudden environmental fluctuations |
| 2. | Are maintained along with intermediate phenotypes in stable conditions |
| 3. | Are favoured when environmental conditions change progressively in one direction |
| 4. | Are equally selected against at both extremes of phenotypic variation |
Subtopic: Hardy Weinberg Law |
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The frequencies of dominant and recessive alleles of a gene in a population are 0.7 and 0.3 respectively. The expected frequency for heterozygotes in the population is likely to be:
| 1. | 42% | 2. | 49% |
| 3. | 21% | 4. | 9% |
Subtopic: Hardy Weinberg Law |
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In a large population which is in Hardy-Weinberg equilibrium, the percentage of the homozygous recessive genotype is 36%. What would be the frequency of heterozygotes?
1. 0.36
2. 0.6
3. 0.48
4. 0.16
1. 0.36
2. 0.6
3. 0.48
4. 0.16
Subtopic: Hardy Weinberg Law |
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Which is the most common mechanism of genetic variation in the population of a sexually-reproducing organism?
| 1. | Recombination |
| 2. | Transduction |
| 3. | Chromosomal aberrations |
| 4. | Genetic drift |
Subtopic: Hardy Weinberg Law |
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