Mutations Chapter 12-4.

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Presentation transcript:

Mutations Chapter 12-4

What are mutations? Any change to the genetic code Gene mutations: A change in one or a few nucleotides in a gene Chromosomal Mutations: a change in the number or structure of chromosomes

What are mutations? Gene mutations: 1) Substitution: Change of one amino acid in the sequence 2)Frameshift: Shift in the reading frame that causes every amino acid after the mutation to be different. Insertion or deletion

What are mutations? 1) Deletion: Loss of part / all Chromosomal mutations: A change in one or a few chromosomes 4 Types: 1) Deletion: Loss of part / all 2) Duplication: Segment is repeated 3) Inversion: Segment is reversed 4) Translocation: Segment breaks off and is reattached

Gene mutation: Substitution

Gene Mutation: Deletion or Insertion?

Gene Mutation: Deletion Insertion

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