AQA AS Biology Unit 2 Genetic Variation in Bacteria

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  • Created by: Chloe
  • Created on: 30-05-13 15:11
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  • Genetic variation- Bacteria
    • Conjugation
      • transfers DNA
      • Horizontal vs Vertical
        • horizontal- across species
        • vertical- from generation to the next
    • Mutation- changing a quantity or structure of DNA
    • Mutations
      • changes in DNA resulting in different characteristics
        • E.G. changing, adding or replicating DNA bases.
        • change base seq. may = different AA's
          • Can change protein to be good/bad.
  • Adaptation- increases long term reproductive success of a species, helping members to survive long enough to breed
  • Cell 1 produces thin projection meeting cell 2
    • Conjugation tube
    • donor replicates a DNA plasmid
      • Plasmid broken to linear + passes along tube
        • Brief contact of 1+2, only portion DNA transferred
          • Recipient acquires new characteristics
  • donor replicates a DNA plasmid
    • Plasmid broken to linear + passes along tube
      • Brief contact of 1+2, only portion DNA transferred
        • Recipient acquires new characteristics
  • Horizontal vs Vertical
    • horizontal- across species
    • vertical- from generation to the next

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