Define genetic erosion .

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Genetic Erosion**: Genetic erosion, also known as genetic depletion or gene pool depletion, refers to the process where the genetic diversity of a population diminishes over time.

2. **Context of Endangered Species**: This phenomenon is particularly relevant to endangered species, which already have a limited gene pool due to their declining numbers.

3. **Mechanism of Depletion**: Genetic erosion occurs when individuals within these endangered species die off before reaching reproductive maturity. This means that they do not contribute their genes to the next generation, leading to a further reduction in genetic diversity.

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