Give one example of preadaptive mutation.

Explanation

### Step-by-Step Solution

1. **Understanding Preadaptive Mutation**:
- Preadaptive mutations, also known as predetermined mutations, are specific genetic changes that occur in organisms which can provide them with an advantage in a particular environment. Unlike random mutations, these mutations can be influenced or selected for by environmental pressures.

2. **Example of Preadaptive Mutation**:
- One clear example of a preadaptive mutation can be seen in the development of the Jersey cow breed.

...