Topic #3: Types of Mutations

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Presentation transcript:

Topic #3: Types of Mutations

Point Mutations Mutations that change a single base pair Usually involve a substitution of one base pair for another Usually only affects a single amino acid

Examples CCC to CCA AAA to UAA

Frameshift Mutations Also called Insertions or Deletions They shift the reading frame of the genetic message It can change every amino acid that follows the point of mutation

Example

Chromosomal Mutations Mutations that change the structure or number of chromosomes Can change the location of genes on a chromosome or even change the number of copies of a gene Often leads to genetic disorders

Example Down syndrome Result of an extra chromosome at pair #21

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