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Unformatted text preview: Sheet1 Page 1 1. How did Hutton's and Lyell's ideas influence Darwin's thinking about evolution? Lyell proposed uniformitarianism, which stated mechanisms of change are constant over time and the same processes are op 1. How does the concept of descent with modification explain both the unity and diversity of life? The unity of life can be attributed to the decent of all organisms from a remote ancestor. Diversity can be found among these 2. Describe how overreproduction and heritable variation relate to evolution by natural selection? Overreproduction happens because only a fraction of the organisms to make a start at reaching adulthood actually make it the C.C. 22.3 2. How does evolution account for a) the similar mammalian forelimbs with different functions and b) the similar lifestyle of the Similar forelimbs can be attributed to homology, which says organisms share characteristics because of common desent. The 1. Explain why genetic variation within a population is a prerequisite for evolution. Also what factors can produce genetic vari Each person has their own genotype, which make individual variation such as height, weight, facial features. When concideri 2. Of all the mutations that occur in a population, why do only a small faction become widespread among the population's me Most mutations are actually slightly harmful to individuals, which then cannot reproduce or give their offspring a less likely cha 1. Suppose a population of organisms with 500 loci is fixed at half of these loci and has two alleles at each of the other loci. Since half the loci are fixed 500/2 = 250. These can only have one allele because they are fixed. The other 250 as two allele 2. If p is the frequency of allele A, which parts of the Hardy-Weinburg equation correspond to the frequency of individuals tha The equation is p^2 + 2pq + q^2 = 1. p^2 represents homozygous dominant for A (AA) 2pq is the expected frequency for hete 1. In what sense is natural selection more "predictable" than genetic drift? Because genetic drift is caused by chance events, which can cause small population's allele frequencies to fluctuate unpredic 2. Distinguish genetic drift from gene flow in terms of how they occur and their implications for future genetic variation.Distinguish genetic drift from gene flow in terms of how they occur and their implications for future genetic variation....
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- Spring '10