12.4 - Mutations

Section Outline 12–4 Mutations A. Gene Mutations B. Chromosomal Mutations

Gene Mutations Gene mutations result from changes in a single gene Point mutations – affect one nucleotide Can include Substitution – exchange on base for another Insertion – add a base Called a frameshift mutation Deletion – a base is missing

Gene Mutations: Substitution, Insertion, and Deletion Section 12-4 Deletion Substitution Insertion

Chromosomal Mutations Deletion Duplication Inversion Translocation Change in structure of chromosome :