The chance elimination of genes from a small population is an example of:

Options

A. selection pressure
B. sepciation
C. adaptation
D. genetic drift

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:**
The question asks about the phenomenon where genes are eliminated from a small population by chance.

2. **Introduction to Hardy-Weinberg Principle:**
The Hardy-Weinberg principle states that the allele frequencies in a population will remain constant from generation to generation in the absence of other evolutionary influences. This principle assumes a large population and random mating.

3. **Factors Affecting Hardy-Weinberg Equilibrium:**
In reality, several factors can disrupt this equilibrium, including genetic drift, mutation, migration, and natural selection.

4. **Defining Genetic Drift:**
Genetic drift is a mechanism of evolution that refers to random changes in allele frequencies in a population. It is particularly significant in small populations where chance events can lead to the loss of genetic variation.

5. **Connecting Genetic Drift to the Question:**
The question specifically mentions the "chance elimination of genes," which aligns perfectly with the definition of genetic drift. In small populations, certain alleles may be lost purely by chance, leading to a reduction in genetic diversity.

6. **Conclusion:**
Therefore, the correct answer to the question is that the chance elimination of genes from a small population is an example of genetic drift.

**Final Answer: Genetic Drift**

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