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Unformatted text preview: Bio 201 Spring 2011 Practice question set for exam 3 1. Which of the above most likely illustrates a proper alignment of a homologous DNA sequence from two species? a) a b) b c) c d) d e) e 2. Which of the following is not a necessary part of natural selection? a) variation exists among individuals of any population b) some variation among individuals affects survival and fertility c) some variation is passed from parent to offspring d) individuals that reproduce better than others most likely possess inherited traits that improve reproduction e) population bottlenecks, which reduce genetic variation Bio 201 Spring 2011 Practice question set for exam 3 3. In the phylogeny above, a grouping that contains exclusively the Domestic dog, the Gray wolf, and the African wild dog would be a) paraphyletic group b) monophyletic group c) a family d) a genus e) a species 4. Gene duplication a) can occur through whole genome duplication b) can create pseudogenes c) produces paralogous genes d) is a type of mutation e) all of the above are correct 5. Which of the following is true about a phenotypic polymorphism that is inherited a) it must be adaptive b) it must be caused at least in part by variation at the DNA level c) it must involve more than one gene d) it must affect mating success e) it must be selectively neutral Bio 201 Spring 2011 Practice question set for exam 3 6. Drosophila fruit flies were a major model in the development of the chromosome theory of inheritance because a) their chromosomes glow in the dark b) their salivary gland chromosomes are very easy to see under a microscope c) viruses frequently recombine their chromosomes, causing mutations d) there are many differences in chromosome number between populations of the same species e) genetic drift has removed all of their chromosomal variation 7. The two steps of the basic evolutionary process in a population are a) nonrandom production of new variation and random survival of variants b) nonrandom flow of variation out of a population and random flow of variants back into that population c) natural selection of the most common species and random survival of less common species d) random production of new variation and nonrandom survival and reproduction of variants e) extinction of non‐variant populations and survival of the fastest reproducing types 8. Similarity in nucleotide or amino acid sequences as a result of common ancestry is called: a) homology b) identity c) commonality d) divergence e) synonymous substitution 9. A rare example of heterozygote advantage is a) sexual selection on male tale length in widowbirds b) the human allele for sickle‐cell anemia conferring resistance to malaria c) selection favoring moths that look like bird droppings d) parallel evolution of similar eye structures in squid and humans e) artificial selection on wild mustard resulting in broccoli after many generations Bio 201 Spring 2011 Practice question set for exam 3 10. Which pair of phylogenetic trees above depict the same hypothesis on the evolutionary relationships of these species? a) A and E b) A and D c) B and C d) B and D e) C and D 11. Which of the following is true about the effective population size a) it is determined by counting the number of individuals present in a population b) it contains equal numbers of males and females c) it is generally not affected by sexual selection d) it is generally less than the number of individuals present in the population e) none of the above are true 12. Which of the following characters or traits can be used to construct a phylogeny? a) morphology b) development/embryology c) behavior d) DNA sequence e) all of the above 13. Which of the follow scenarios fulfills the necessary criteria for calling two taxa distinct biological species a) As the climate warms, a frog population moves up in altitude on two separate mountains and the populations become isolated from each other. Bio 201 Spring 2011 Practice question set for exam 3 b) One specimen of an extinct mammal species is twice the size of another extinct mammal species. The larger of the two has a long snout and it is bright red and the smaller has a very short snout and it is pure white. c) Mating between members of two different populations results in offspring that have slightly different coloration than offspring from within‐population matings d) Two populations of plants live on either side of a large river, and it has been shown that pollen cannot blow across the river. e) It is shown that two sympatric populations of similar‐looking birds have completely sterile offspring when the two populations hybridize 14. Which of the following is NOT an original idea contributed by Charles Darwin? a) All life is descended from a common ancestor b) natural selection c) sexual selection d) there are often more offspring born than can be supported by available resources e) All of the above are Darwin's original ideas 15. what are you? a) an amoebozoan b) diplontic c) an organism with an isomorphic life cycle d) isogamous e) an apicomplexan 16. Which of the following statements about genomes is true? a) more complex organisms tend to have larger genomes. b) larger genomes have a higher proportion of functional genes than smaller genomes c) mammals have the largest genomes of any organisms studied to date d) the overall size of the genome is just about the same in all eukaryotes e) overall, protein coding regions of genomes tend to have higher mutation rates than non‐protein coding regions answers: 1 b, 2 e, 3 a, 4 e, 5 b, 6 b, 7 d, 8 a, 9 b, 10 e, 11 d, 12 e, 13 e, 14 d, 15 b, 16 a ...
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