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DNA Mutations

DNA Mutations. Mutations are changes in DNA. They can be good, bad or indifferent Most mutations are indifferent because they happen on introns . Very few mutations are good Mutations can occur on somatic cells or on gamates. Types of Mutation. Point Mutation.

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DNA Mutations

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  1. DNA Mutations

  2. Mutations are changes in DNA • They can be good, bad or indifferent • Most mutations are indifferent because they happen on introns. • Very few mutations are good • Mutations can occur on somatic cells or on gamates

  3. Types of Mutation Point Mutation One base of a gene is changed Original: A C T /A G C New: A G T /A G C

  4. Types of Mutation Frame Shift Mutation One or more bases are inserted or deleted which causes a “shift” in how the codons are read Original: ACT/AGC New: ACT/TAG/C

  5. Types of Mutation Deletion Results in missing DNA • can cause a frameshift mutation Original: A C T/ G T C New: T G T /C

  6. Types of Mutation Insertion Addition of extra DNA • can also cause frameshift mutations Original: A C T /G T C New: A C T /A T T/G T C

  7. Types of Mutation Inversion An entire section of DNA is reversed Original: A C T G T C New: A T G TC C

  8. Types of Mutation Translocation A section of DNA is moved to a different gene or chromosome

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