Effect of genetic drift is clearly seen in

Options

A. Small population
B. Large population
C. At species level
D. At individual level

Answer

**Step-by-Step Solution:**

1. **Understanding Genetic Drift**: Genetic drift is a mechanism of evolution that refers to random changes in allele frequencies within a population. It is particularly significant in small populations where chance events can lead to large changes in genetic makeup.

2. **Identifying the Impact of Genetic Drift**: The effects of genetic drift are most pronounced in small populations. In these populations, random events (like natural disasters) can drastically alter the genetic composition, leading to a loss of genetic diversity.

3. **Example of Genetic Drift**: Consider a population of bugs where there are two color variants: green and pink. If a random event (such as a natural disaster) results in the death of a majority of the green bugs, the frequency of the pink bugs will increase simply due to chance. This illustrates how genetic drift can lead to significant changes in allele frequencies.

4. **Conclusion**: Therefore, the effect of genetic drift is clearly seen in small populations. In larger populations, the effects of genetic drift are diluted by the larger number of individuals, and other mechanisms such as gene flow and natural selection tend to have a more significant impact.

**Final Answer**: The effect of genetic drift is clearly seen in small populations.

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