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Genetic variation and natural selection

Genetic variation and natural selection - Genetic variation...

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1 Genetic variation and Genetic variation and natural selection natural selection How does a population evolve? Outline Outline 1. Natural Selection 2. How is genetic variation measured? 3. Directional selection 4. Stabilizing selection 5. Disruptive selection 6. Sexual selection 7. Key terms 8. Conclusions Natural selection Natural selection circle6 Natural selection is the primary mechanism of adaptive evolution circle6 Natural selection Accumulates and maintains favorable genotypes in a population Natural selection increases the frequencies of certain genotypes, fitting organisms to their environment over generations
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2 How is genetic How is genetic variation measured? variation measured? circle6 Population geneticists measure genetic variation both at the level of whole genes and at the molecular level of DNA. circle6 Gene diversity measures the average percent of gene loci that are heterozygous.
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