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Chapter 17: Population Genetics and Evolution (Evolution and the Origin of…

- - - - Purposefully change Alleles
    - - Event in which organism cannot adapt
    - - Survival of the Fittest
      - More Offspring
      - Lack of Diversity
    - - Purpose, Intention, Planning, and Voluntary Decision Making
        
        Not part of Natural Selection
      - Best Alleles stay
    - - Existing alleles Decrease
      - New alleles increase
- - - - Prezygotic Isolation
        
        Prevent pollen from plant to plant
      - Sympatric Speciation
        
        Two groups become isolated, grow together
      - Biological Phenomenon that prevents Gene flow
      - Postzygotic Internal Isolation
        
        Subpopulations can no longer interbreed
        
        Hybrid Sterility
        
        Seeds produce sterile Plant
        
        Hybrid Inviability
        
        Zygot or Embryo Die Early
    - - Founder Individual
        
        Two sets of Alleles
      - Genetic Drift
        
        Erratical Change in gene pool
      - Many new species, short period of time
    - - Allopatric
        
        Geographic Speciation
        
        Occurrence of Speciation
      - Physical non-living feature
        
        Prevents exchange of genes
  - - - Wind
      - Floods
      - Fur or Feathers
    - - Thousands of Combinations
    - - Birds
      - Insects
      - Wind
- - - - Oxygen Addition from Photosynthesis
  - - - No limit
        
        Due to Lack od O2
    - - Gamma Radiation
      - Heat
    - - Second Atmosphere
        
        Gases of rock matrix
      - Reducing
        
        Lack of Molecular Oxygen