In a population in genetic equilibrium, the frequency of the recessive allele is found to be 0.2. What is the frequency of heterozygotes in this population?
1. | 0.8 | 2. | 0.16 |
3. | 0.32 | 4. | 0.64 |
The phenomenon of the evolution of different species in a given geographical area starting from a point and spreading to other habitats is called:
1. | Saltation | 2. | Co-evolution |
3. | Natural selection | 4. | Adaptive radiation |
When a new population is established by a very small number of individuals from a larger population, sometimes becoming a different species, the process is called as:
1. | Founder effect | 2. | Genetic bottleneck |
3. | Adaptive radiation | 4. | Convergent evolution |
The process of evolution of different species in a given geographical area starting from a point and literally radiating to other areas of geography [habitats] is known as:
1. | Convergent evolution | 2. | Divergent evolution |
3. | Adaptive radiation | 4. | Artificial selection |
All the following are examples of evolution by anthropogenic action except:
1. | Industrial melanism seen in peppered moth |
2. | Pesticide resistance in pests |
3. | Emergence of antibiotic resistant bacteria |
4. | Streamlined body in dolphins |
Similar biological structures or sequences in different taxa are homologous if they:
1. | always perform the same function |
2. | result from convergent evolution |
3. | do not serve any known function |
4. | are derived from a common ancestor |
The natural selection operating as shown in the given figure is called as:
1. | Disruptive | |
2. | Directional | |
3. | Stabilizing | |
4. | Retrogressive |
Assume that 4 % of people in a population are born with sickle cell anemia [Sickle cell anemia is autosomal recessive]. What percentage of individuals will have the selective advantage of the sickle-cell trait?
1. | 16 % | 2. | 32 % |
3. | 36 % | 4. | 96 % |
Statement I: | They evolved in a similar environment, rather than inherited from a recent common ancestor. |
Statement II: | They have a common descent and have evolved from a shared ancestor. |
1. | Statement I is correct; Statement II is incorrect |
2. | Statement I is correct; Statement II is correct |
3. | Statement I is incorrect; Statement II is correct |
4. | Statement I is incorrect; Statement II is incorrect |
I: | It is the process of evolution of different species in a given geographical area starting from a point and literally radiating to other areas of geography (habitats). |
II: | When more than one adaptive radiation appeared to have occurred in an isolated geographical area (representing different habitats), one can call this divergent evolution. |
1. | Only I | 2. | Only II |
3. | Both I and II | 4. | Neither I nor II |