What are point mutations?Give one example of point mutations

Explanation

### Step-by-Step Solution:

1. **Definition of Point Mutations**:
Point mutations are genetic alterations that involve a change in a single base pair in the DNA sequence. This can occur through the substitution, insertion, or deletion of a nucleotide.

2. **Types of Point Mutations**:
- **Substitution**: One base pair is replaced by another. This can lead to different types of mutations:
- **Silent Mutation**: No change in the amino acid sequence.
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