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23.1 Genetic variation (Sources (New Alleles (Mechanisms (Natural…

- - - - Natural selection
        
        Adaptive evolution
      - Genetic drift
      - Gene flow
    - - Mutation
        
        Only gametes
        
        Pass to offspring
        
        Often harmless
        
        Can be neutral
        
        Harmful if
        
        Protein change
      - Gene duplication
  - - - Delete, disrupt or rearrange
    - - Duplication
        
        New functions
        
        e.g Better sense of smell
  - - - Low
        
        Plants & Animals
      - High
        
        Prokaryotes
      - Higher
        
        Viruses
- - - - Gene
      - DNA segmants
  - - - Inherited genotype
      - Environmental influences
  - - - variation with genetic
- - - - Organisms evelve
  - - - But only populations evolve