Which of the following is a feature of genetic equilibrium ?

Options

A. The gene pool remains constant
B. Alleles frequency of a population is stable
C. The total sum of all the allele frequency is 1.
D. All of the above

Answer

To solve the question regarding the features of genetic equilibrium, we will analyze each option provided and determine which one(s) are correct.

### Step-by-Step Solution:

1. **Understanding Genetic Equilibrium**:
- Genetic equilibrium refers to a state in a population where allele frequencies remain constant over generations. This concept is primarily explained by the Hardy-Weinberg principle.

2. **Analyzing Each Option**:
- **Option 1: The gene pool remains constant**:
- This is true. In genetic equilibrium, the gene pool (the total genetic diversity within a population) does not change.

- **Option 2: Allele frequency of a population is stable**:
- This is also true. In a state of genetic equilibrium, the frequencies of alleles in the population do not fluctuate.

- **Option 3: The total sum of all allele frequencies is 1**:
- This statement is true as well. According to the Hardy-Weinberg principle, the sum of the frequencies of all alleles for a particular gene in a population must equal 1.

- **Option 4: All of the above**:
- Since all the previous statements are true, this option is correct.

3. **Conclusion**:
- The correct answer is **Option 4: All of the above**. This indicates that all listed features are characteristics of genetic equilibrium.

### Final Answer:
**Option 4: All of the above**