Ch 16
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| show | false
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| show | He did not know the source of the variation that was so central to his theory. He could not explain how inheritable traits were passed from one generation to the next
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| show | 1genetics 2molecular biology 3evolutionary theory
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| A collection of individuals of the same species in a given area is a _______________ | show 🗑
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| The combined gentic information of all members of a particular population is a ________________ | show 🗑
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| T/F The gene pool typically contains just one allele for each inheritable trait | show 🗑
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| show | relative frequency
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| show | 1Mutations 2Genetic Shuffling
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| show | any change in a sequence of DNA
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| show | because the mistakes in the replication of DNA or as a result of radiation or chemicals in the environment
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| show | true
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| T/F Mutations always affect lengthy segments of a chromosome | show 🗑
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| T/F Mutations always affect an organisms phenotype | show 🗑
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| show | false
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| T/F Most inheritable differences are due to gene shuffling that occurs during the production of gametes | show 🗑
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| T/F Sexual reproduction is a major source of variation in many populations | show 🗑
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| show | true
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| T/F Sexual reproduction can produce many dif. genetic combinations | show 🗑
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| T/F Sexual reproduction can change the relative frequency of alleles in a population | show 🗑
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| T/F The number of phenotypes produced for a given trait depends on how many genes control the trait | show 🗑
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| T/F Most traits are controlled by a single gene | show 🗑
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| show | false
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| show | It would disappear from the gene pool completely or fewer copies of an allele would be passed down to future generations
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| If a trait had no effect on an organisms fitness, what would happen to the alelle for that trait? | show 🗑
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| show | 1Directional selection 2Stabilizing Selection 3Disruptive Selection
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| show | Individuals at one end of the curve have higher fitness then individuals in the middle or at the other end
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| show | Individuals near the center of the curve have higher fitness than individuals at either end
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| What is disruptive selection? | show 🗑
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| An increase in the average size of beaks in Galapagos finches is an example of ________ selection | show 🗑
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| show | false
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| show | false
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| Random change in allele frequencies in small populations is called ________ | show 🗑
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| show | founder effect
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| What is an example of the founder effect? | show 🗑
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| What does the Hardy-Weinberg principle state? | show 🗑
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| The situation in which allele frequencies remain constant is called _________ | show 🗑
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| 5 Conditions req to maintain genetic equilibrium | show 🗑
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| Why is large population size important in maintaining genetic equilibrium | show 🗑
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| What is speciation? | show 🗑
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| T/F Individuals in dif species can have the same gene pool | show 🗑
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| What does it mean for 2 species to be reproductively isolated from each other? | show 🗑
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| show | Populations become reproductively isolated from each other
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| 3 Ways reproductive isolation occurs | show 🗑
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| show | 2 populations are capable of interbreeding but have dif. in courtship rituals or other types of behavior
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| show | true
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| show | 2 populations are separated by geographic barriers such as rivers, mountains, or bodies of water
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| show | geographic
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| show | false
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| What is an example of temporal isolation? | show 🗑
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| show | false
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| Hyp tested by Grants: T/F The finches beak size/shape -enough inheritable variation to provide raw material for nat. selection The dif. finch species are descendants of common mainland ancestor | show 🗑
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| Hyp tested by Grants: T/F Differences in the finches' beak size/shape produce dif in fitness that cause nat selection, The evolution of finches is proceeding slow/gradually | show 🗑
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| Observ. by Grants: T/F Dif. in beak size=more imp. for survival during wet season, When food for finches was scarce, individuals with the largest beaks were less likely to survie | show 🗑
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| show | false/true
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| show | 1Founders arrive 2Separation of populations 3Changes in the gene pool 4Reproductive isolation 5Ecological competition 6Continue evolution
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