IB Biology Topic D1.3 Mutations and Gene Editing…

A Gene Mutation Is A Structural Change To The Base Sequence

A gene mutation changes the sequence of bases in a gene.
The base sequence carries the instructions for building a protein, so changing it can change the protein.
Three types of structural change are possible:
1. Substitution swaps one base for another.
2. Insertion adds one or more bases.
3. Deletion removes one or more bases.