Biol_1202_2009_ex._1_review_questions_answered

Biol_1202_2009_ex._1_review_questions_answered - 1 Biology...

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Biology 1202 Fall 2009 Review Questions for Exam 1 Chapter 22 and 23 Vocabulary : Theory, hypothesis, acquired characters, adaptive radiation, Galapagos finches, artificial selection, super bugs, convergent vs. divergent evolution, analogous vs. homologous structures, gene pool, allele, Hardy Weinberg Law, genetic drift, gene flow, bottleneck, founder’s effect, polymorphism, clines, geographic variation, heterozygote advantage, neutral variation, directional, stabilizing or diversifying selection, sexual reproduction, sexual selection, sexual dimorphism, constraints to evolution, trade off 1. Who were the major scientists that developed the background information necessary for Darwin to develop his theory, and what did each scientist contribute? Plato and Aristotle, Cuvier, Lamarck, Lyell 2. How did Darwin’s early travels contribute to his ideas? Biogeographical differences in fauna and adaptive radiations suggested evolution by natural selection 3. Be able to list the major assumptions (observations) and predictions of Darwin’s theory of natural selection. Populations could, but don’t increase because resources are limiting, so only the most fit offspring survive, causing long-term increases in frequency of adaptations in populations 4. Discuss how artificial selection, pepper moths, biogeography, homologies, and the fossil record all provide evidence for natural selection and evolution. Selection provides direct evidence, homologies, biogeography, and fossil record provide indirect evidence 5. If the frequency of the recessive phenotype is 16 %, what is the frequency of the recessive allele? The dominant allele? What are the other two genotypic frequencies? What if the recessive phenotypic frequency is 10 -8 ? q 2 = .16, q = 0.4, p = 0.6, p 2 = 0.36, 2pq = 0.48 6. Give two examples of factors that decrease the numbers of individuals reproducing in populations, and note how they affect the frequency of rare alleles, and the amount of genetic variation and heterozygosity within populations.
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This note was uploaded on 12/02/2009 for the course BIOL 1202 taught by Professor Gregg during the Spring '08 term at LSU.

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Biol_1202_2009_ex._1_review_questions_answered - 1 Biology...

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