Q. No.
The most critical evolutionary process, that leads to changes in allele frequencies and favors or promotes adaptation as a product of evolution, is :
| 1. | Genetic drift | 2. | Gene migration |
| 3. | Mutation | 4. | Natural selection |
The differential success in the reproduction, of an organism, in a given environment, is :
| 1. | Adaptation | 2. | Natural Selection |
| 3. | Adaptive radiation | 4. | Saltatory evolution |
A small population experiences a sudden crash in size due to a natural calamity. The biggest threat to the population is:
1. loss of genetic variability
2. tendency towards assortative mating
3. reduced gene flow
4. Hardy - Weinberg disequilibrium
What exactly does the nature act upon when selecting an organism?
1. dominant alleles
2. recessive alleles
3. phenotype
4. combined genotype
Identify the incorrect statement:
| 1. | Neanderthals lived between 1,50,000 and 1,00,000 years back. |
| 2. | Modern Homo sapiens arose between 75000 and 10000 years ago. |
| 3. | Pre-historic cave art developed around 18000 years ago. |
| 4. | Agriculture came around 10000 years ago. |
Which of the following would be an example of a population that can show the potential for rapid speciation?
| 1. | small in number but highly variable gene pool |
| 2. | large in number with large variations in the gene pool |
| 3. | sexual dimorphism amongst members |
| 4. | isolated inbred population |
A population geneticist finds that a new allele in a population has suddenly increased in frequency. Most likely this allele is:
1. mutating rapidly
2. flowing with emigrants
3. strongly selected for
4. a product of assortative mating
Which of the following types of natural selection reduces variation but does not change the mean value?
| 1. | directional | 2. | stabilizing |
| 3. | disruptive | 4. | all of these |
In modern terms, selection refers to :
| 1. | inheritance of dominant characters |
| 2. | differential reproduction |
| 3. | a decrease in allele frequency in a population |
| 4. | differences in the contribution of various genotypes to the next generation |
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