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Genetic Variation and Its Role in Evolution

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Natural Selection and Evolution

  • Natural Selection Causes Adaptation
    07:48
  • Adaptation Improves Fitness
    02:57
  • Evolution can Occur Via Natural Selection
    04:32

Genetics and Allele Frequencies

  • Allele Frequencies
    06:36
  • Mendelian and Population Genetics
    04:26
  • Genetics and Allele Frequencies Example 1
    02:56

Genetic Variation

  • Sources of Genetic Variation
    02:16
  • Sexual Reproduction and Recombination
    05:08
  • Mutations
    06:42

Introduction to Mendel's Experiments

  • Why Pea Plants?
    01:58
  • Introduction to Mendel's Experiments
    03:50

Mendel's Experiments

  • Self-Fertilization Experiment: True-Breeding vs. Hybrid Plants
    05:48
  • Mendel's Experiments
    03:02
  • Cross-Fertilization Experiment: Dominant vs. Recessive Alleles
    05:04