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Population Genetics - Population Population Genetics...

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1 Population Population Genetics Genetics How does a population evolve? Outline Outline 1. Key Concepts 2. Individuals Don’t evolve, Populations Do 3. The Hardy-Weinberg Theorem 4. The Microevolution and Natural Selection 5. Genetic drift 6. Gene flow Key Concepts: circle6 Individuals of a population have the same number and kinds of genes circle6 In a population, a gene may exist in different forms circle6 Microevolution means that changes have occurred in a population’s allele frequencies circle6 Allele frequencies can change through mutations, gene flow, genetic drift, nonrandom mating, and natural selection
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2 Individuals Don Individuals Don’ t Evolve, Populations Do Populations Do circle6 Population - Is a localized group of individuals that are capable of interbreeding and producing fertile offspring circle6 Polymorphism - traits come in two or more distinct forms circle6 Gene Pool - pool of genetic resources that, in theory, is shared by all members of the population Polymorphism A Gene Pool
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3 The Hardy The Hardy- Weinberg Theorem Weinberg Theorem circle6 The Hardy-Weinberg Theorem : The frequences of alleles in the gene pool will remain constant unless acted by other agents circle6 This is a theoretical state in which a population is not evolving circle6 Only if:
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