The Role of Natural Selection in Biological Evolution Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

Page 1

Question 1 1. What is the heterozygote advantage?

Question 2 2. The malaria/sickle-cell relationship is an example of which type of diversity maintaining mechanism?

Question 3 3. Charles Darwin _____.

Question 4 4. Evolution occurs in _____.

Question 5 5. An example of hybrid breakdown may be found in which one of the following?

Page 2

Question 6 6. Which of the following are considered post-zygotic barriers?

Question 7 7. Why do scientists use the Hardy-Weinberg equation?

Question 8 8.

Which of the following criteria must be met for Hardy-Weinberg equilibrium?

I. Beneficial trait

II. Non-random mating

III. Large population size

Question 9 9. Why are alleles the driving force behind a population's evolutionary path?

Question 10 10. Why does the island of Madagascar have a unique population?

Page 3

Question 11 11. Which best describes genotype?

Question 12 12. Why does natural selection act on phenotypes and not genotypes?

Question 13 13. The coat color gene of a population of squirrels is defined by a dominant allele G, which encodes a gray coat, and a recessive allele g, which encodes a black coat. In a population, genetic typing reveals the genotypic distribution to be 50 GG, 30 Gg, and 20 gg. If this population is in equilibrium, then what should the genotypic frequency of GG squirrels in this population be?

Question 14 14. The coat color gene of a population of squirrels is defined by a dominant allele G, which encodes a gray coat, and a recessive allele g, which encodes a black coat. In a population, genetic typing reveals the genotypic distribution to be 50 GG, 30 Gg, and 20 gg. If this population is in equilibrium, then what should the genotypic frequency of gg squirrels in this population be?

Question 15 15. Darwin's finches are an example of what type of evolution?

Page 4

Question 16 16. Which of the following is an example of divergent evolution?

Question 17 17. Consider a population of fish where the length of a given fish's dorsal spine is determined by a single gene, which is defined by two different alleles. The dominant A allele encodes a long dorsal spine and the recessive a allele encodes a short dorsal spine. The fish is diploid and reproduces sexually. If the number of AA individuals is 500, the number of Aa individuals is 200, and the number of aa individuals is 300, then what is the chance that I will catch a fish with a long dorsal spine from this population?

Question 18 18. After observing a population of fish with interesting protective spines, a scientist decides to move two of the fish into a new pond to create a new population of fish to study the ability of the fish to survive a new set of predators. Which of the following evolutionary agents did the scientist introduce?

Question 19 19. A scientist has observed animals in a particular habitat for some time. She notices that in a population of birds those with either short or long beaks can find more food than those with average sized beaks. Over time, she notices a higher proportion of birds in the population have either short or long beaks. She is observing:

Question 20 20. A scientist has observed animals in a particular habitat for some time. She notices that the slowest gazelles tend to fall victim to predators more frequently than faster ones. Over time, she notes that the gazelle herd on average runs faster. She is observing:

Page 5

Question 21 21. How many possible genetic combinations can occur for an organism with a haploid number of 12?

Question 22 22. Which of the following is NOT true about meiosis?

Question 23 23. Why is genetic diversity essential to a population's survival?

Question 24 24. The ability of an individual to survive and reproduce is called _____.

Question 25 25. What is speciation?

Page 6

Question 26 26. Using the criteria outlined in the Hardy-Weinberg equilibrium, determine which of the following populations can be balanced.

Question 27 27. The effects of genetic drift will be greater for what kind of populations?

Question 28 28. Natural selection alters which of the following?

Question 29 29. The coat color gene of a population of squirrels is defined by a dominant allele G, which encodes a gray coat, and a recessive allele g, which encodes a black coat. In a population, genetic typing reveals the genotypic distribution to be 50 GG, 30 Gg, and 20 gg. If this population is in equilibrium, then what should the genotypic frequency of Gg squirrels in this population be?

Question 30 30. What is convergent evolution?

The Role of Natural Selection in Biological Evolution Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

CSET Science Subtest II Life Sciences (217): Practice & Study Guide  /  Science Courses
Support