UC Berkeley
Image Caption
A substitution is a mutation that exchanges one base for another (i.e., a change in a single "chemical letter" such as switching an A to a G).
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Mutation (2 of 4) Insertion
Insertions are mutations in which extra base pairs are inserted into a new place in the genes.
Mutation (3 of 4) Deletion
Deletions are mutations in which a section of genes is lost, or deleted.