The change of frequency of alleles in a population by chance is called :

Options

A. Evolution
B. Genetic drift
C. Gene migration
D. Genetic equilibrium

Answer

To solve the question "The change of frequency of alleles in a population by chance is called:", we need to analyze the given options and understand the concepts behind them.

### Step-by-Step Solution:

1. **Understanding the Question**: The question is asking for a term that describes the change in allele frequencies in a population due to random chance rather than natural selection or other factors.

2. **Reviewing the Options**:
- **Evolution**: This refers to the change in characteristics of a species over generations, primarily driven by natural selection. It is not specifically about random changes in allele frequency.
- **Genetic Drift**: This is a process where allele frequencies in a population change due to random sampling and chance events. It is specifically about random fluctuations in allele frequencies.
- **Gene Migration**: This involves the movement of individuals and the transfer of alleles from one population to another, which is not about random changes within a single population.
- **Genetic Equilibrium**: This is a state where allele frequencies remain constant over generations, meaning there is no change.

3. **Identifying the Correct Answer**: Among the options, "Genetic Drift" is the only term that accurately describes the random change in allele frequencies in a population. Therefore, the correct answer is:
- **Genetic Drift**.

### Final Answer:
The change of frequency of alleles in a population by chance is called **Genetic Drift**.

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