The process of mating between closely related individuals is

Options

A. out-breeding
B. Inbreeding
C. Hybridisation
D. heterosis

Answer

**Step-by-Step Solution:**

1. **Understanding the Terms**:
- First, we need to clarify the terms related to mating and breeding. The options provided are outbreeding, inbreeding, hybridization, and heterosis.

2. **Defining Inbreeding**:
- Inbreeding refers to the mating or breeding between closely related individuals. This can occur within the same species and often involves relatives such as siblings or parents and offspring.

3. **Differentiating Other Terms**:
- **Outbreeding**: This is the mating between individuals that are not closely related, often leading to greater genetic diversity.
- **Hybridization**: This involves crossing individuals from different species or varieties, resulting in hybrid offspring.
- **Heterosis**: Also known as hybrid vigor, it refers to the phenomenon where hybrid offspring exhibit superior qualities compared to their parents.

4. **Conclusion**:
- Based on the definitions and explanations, the correct answer to the question "The process of mating between closely related individuals is" is **inbreeding**.

**Final Answer**: Inbreeding

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