Transgenic animals are the animals are the animals in which foreign gene is expressed. Such animals can be used to study the fundamental biological process, phenomenon as well as for producing products useful for mankind. Give one example for each type.

Explanation

### Step-by-Step Solution:

1. **Definition of Transgenic Animals**:
Transgenic animals are those that have had a foreign gene inserted into their genome. This gene is not originally part of their genetic makeup, and its expression can lead to various biological changes and benefits.

2. **Use in Studying Biological Processes**:
Transgenic animals serve as model organisms to study fundamental biological processes. They can be used to understand gene regulation, metabolism, and disease mechanisms.

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