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Get Answers to all your Questions
- #Genetics and Evolution
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Select the correct option w.r.t following statements
Statement 1:Genetic drift is the change in gene frequency in a population hence, it forms an important factor for evolution.
Statement 2:Smaller populations have greater chances for genetic drift
Both statements are true and statement 2 is the correct explanation of statement 1.
Both statements are true but statement 2 is the incorrect explanation of statement 1.
Both 1 and 2 statements are incorrect
Statement is correct but statement 2 is incorrect.
Answers (1)
As we have already discussed in Mechanism of Evolution: Genetic Drift, Founder Effect & Bottleneck Effect -
Genetic drift is one of the basic mechanisms of evolution. In each generation, some individuals may, just by chance, leave behind a few more descendants (and genes) than other individuals. The genes of the next generation will be the genes of the individuals that happen to survive by chance and not necessarily by favorable variations. The effect of genetic drift is stronger in small populations as compared to the larger ones. Because genes are becoming prominent due to a chance event, it does not matter if they confer benefit or harm to the individual. Hence, the correct option is (b).
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