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12.4 - Mutations.

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Presentation on theme: "12.4 - Mutations."— Presentation transcript:

1 Mutations

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

3 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

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

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

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