- 1(current)
Q. No.The change in the frequency of an existing gene variant in a population due to random sampling of organisms is known as:
| 1. | Saltation | 2. | Adaptive radiation |
| 3. | Genetic drift | 4. | Gene flow |
Subtopic: Â Difference Between Drift & Selection |
 64%
From NCERT
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The concept of genetic bottlenecks includes which of the following?
| 1. | a loss of genetic diversity in descendent populations |
| 2. | extensive gene flow |
| 3. | sharing of genetic material between two populations |
| 4. | increased ability to resist new diseases |
Subtopic: Â Difference Between Drift & Selection |Â Population Genetics |Â Concept of Isolation |
 61%
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An island population faced a natural calamity and the population crashed to only 30 organisms. After some time the number of organisms grew to 5000 but still the threat of extinction is large. This is most likely due to:
| 1. | Founder effect | 2. | Bottleneck effect |
| 3. | Edge effect | 4. | Heterosis |
Subtopic: Â Difference Between Drift & Selection |
 76%
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- 1(current)
Q. No.
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