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Answers4 - 6 Questions 6-14 are conceptual use lecture and...

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Biology 180 Study Questions: Speciation, Macroevolution, Phylogenies and Plants Answers 1. 1/2500=q 2 ; q=0.02. The frequency of the recessive cf allele in the U.S. population is 0.02 (or 2%). 2. Directional selection. 3. Stabilizing selection. (FYI: this is in salmon. The red dots refer to hatchery fish, with smaller, more numerous eggs, moving the optimum phenotype by crossing with wild fish). 4. Sexual selection. 5. a) The mutant neutral allele will evolve mostly by drift. Since drift is a random process, we cannot predict the allele’s fate. No gene flow (isolated population), no selection on neutral alleles. b) A beneficial mutation is likely to increase in frequency due to selection and become fixed. 6.
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Unformatted text preview: 6. Questions 6-14 are conceptual; use lecture and textbook materials to do them on your own. They are meant to guide your study. 7. 8. 9. 10. 11. 2) First eukaryotic cell 5) Permian-Triassic mass extinction 8) Modern humans ( Homo sapiens ) appear in the fossil record 1) First bacterium 6) Cretaceous-Tertiary mass extinction 4) First land plant 7) Most recent common ancestor of humans and chimps 3) Cambrian explosion 12. 13. 14. 15. 16. Eukaryotes are a natural group, but prokaryotes are not, because they are not monophyletic (cannot trace to a common ancestor without including the eukaryotes). Archaea is sister to Eukaryotes. 17. d,b,e. !"#$%& ()*+",+- *.$ /-0" 1#+2 ,. "3- -4*56 7)89: ;, !",1,8...
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