Here's why:
* Point mutation: A point mutation is a change in a single nucleotide within a DNA sequence. This can involve:
* Substitution: One base is replaced by another (e.g., A replaced by T)
* Deletion: One base is removed
* Insertion: One base is added
* DNA replication: This is the process by which a copy of a DNA molecule is made. During this process, errors can occur, including base substitutions.
Therefore, the specific scenario you described (one base being replaced by another) is a point mutation, specifically a base substitution occurring during DNA replication.
