With respect to understanding diseases, discuss the importance of transgenic animal models.

Explanation

### Step-by-Step Solution:

1. **Definition of Transgenic Animals**:
- Transgenic animals are those whose DNA has been altered to include and express one or more foreign genes. This genetic manipulation allows researchers to study the effects of specific genes on various biological processes, including disease development.

2. **Importance in Disease Study**:
- Transgenic animal models are crucial for understanding the genetic contributions to diseases. By introducing specific genes associated with human diseases into these animals, researchers can observe the resulting phenotypes and disease progression. This helps in identifying the role of particular genes in diseases such as cancer, cystic fibrosis, rheumatoid arthritis, and Alzheimer’s disease.

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