Biology
Grade-10
Easy
Question
Genetic drift is defined as a shift in the allele frequency of a population caused by which of the following?
- Random chance
- Natural selection
- Non-random mating (sexual selection)
- Artificial selection
Hint:
Genetic drift is defined as a shift in the allele frequency of a population caused by random chance.
The correct answer is: Random chance
- Genetic drift can be described as the change in the frequency of the allele of a population cause due to random chances.
- Genetic drift can result into complete disappearance of the gene and reduces the genetic variation in the population.
- It also can result into expresseion of rare alleles.
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How much is the effect of genetic drift when there are few copies of an allele?
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Match the following.
|
Sr.no |
Column I |
Column II |
| A |
A period of low population numbers when genetic diversity is lost |
1) Allele fixation |
| B |
The change in allele frequencies that was initiated by a small number of individuals initiating a new population in a novel habitat |
2) Genetic bottleneck |
| C |
Random changes in the frequency of alleles in succeeding generations of a population |
3) Founder effect |
| D |
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4) Genetic drift |
Match the following.
|
Sr.no |
Column I |
Column II |
| A |
A period of low population numbers when genetic diversity is lost |
1) Allele fixation |
| B |
The change in allele frequencies that was initiated by a small number of individuals initiating a new population in a novel habitat |
2) Genetic bottleneck |
| C |
Random changes in the frequency of alleles in succeeding generations of a population |
3) Founder effect |
| D |
The situation in which only one of previously many alleles at a locus remains among individuals of a population |
4) Genetic drift |
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