Q. No.
If a random mating population is in equilibrium, which of the following brings about a change in gene frequency in a non-directional manner?
1. Mutations
2. Random drift
3. Selection
4. Migration
1. Mutations
2. Random drift
3. Selection
4. Migration
Random genetic drift in a population probably results from
1. highly genetically variable individuals.
2. inbreeding within this population
3. constant low mutation rate
4. large population size
In recent years, DNA sequences (nucleotide sequence) of mtDNA and Y chromosomes were considered for the study of human evolution, because
| 1. | they are small, and therefore, easy to study |
| 2. | they are uniparental in origin and do not take part in recombination |
| 3. | their structure is known in greater detail. |
| 4. | they can be studied from the samples of fossil remains. |
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The most likely reason for the development of resistance against pesticides in insects damaging a crop is
1. Genetic recombination
2. directed mutations
3. Acquired heritable changes.
4. Random mutations
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Which of the following is relatively most accurate method for dating of fossils?
1. Electron-spin resonance method
2. Uranium-lead method
3. Potassium-argon method
4. Radio-carbon method
De Vries gave his mutation theory on organic evolution while working on
1. Oenothera lamarckiana
2. Drosophila melanogaster
3. Pisum sativum
4. Althea rosea
Which one of the following amino acids was not found to be synthesized in Miller’s experiment?
| 1. | Glycine | 2. | Aspartic acid |
| 3. | Glutamic acid | 4. | Alanine |
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An important evidence in favor of organic evolution is the occurrence of
1. Homologous and vestigial organs
2. Analogous and vestigial organs
3. Homologous organs only
4. Homologous and analogous organs
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Which one of the following is not a living fossil?
1. King crab
2. Sphenodon
3. Archaeopteryx
4. Peripatus
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