Biology Chapter 23 Objectives

Biology Chapter 23 Objectives - Chapter 23 The Evolution of...

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Chapter 23 The Evolution of Populations Population Genetics 1. The statement “It is the population, not the individual, that evolves,” means that some traits become more common within the population, while other traits become less common. 2. Mendel’s particulate hypothesis of inheritance provided much-needed support for Darwin’s theory of evolution by natural selection. Mendel proposed that parents pass on discrete heritable units (genes) that retain their identities in offspring. 4. “Modern synthesis” is a comprehensive theory of evolution that integrates ideas from many other fields. 5. Population is a localized group of individuals that are capable of interbreeding and producing fertile offspring. Species are a group whose members possess similar anatomical characteristics and have the ability to interbreed. A gene pool is the total aggregate of genes in a population at any one time. 6. Meiosis and random fertilization alone will not alter the frequency of alleles or genotypes in a population. All homozygous populations produce only homozygotes, while about half the offspring of the heterozygous plants are homozygous. It does not take many generations before the population is homozygous. These species will still produce their gametes at random from their gene pools. Also, The repeated shuffling of a population’s gene pool over the generations cannot change the frequency of one allele relative to another. 7.
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Biology Chapter 23 Objectives - Chapter 23 The Evolution of...

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