Evolution: Theories and Principles Chapter Exam

Exam Instructions:

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Question 1 1. 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. What is the allelic frequency of the g allele?

Question 2 2. Balanced polymorphism is a situation in which:

Question 3 3. Which of the following is not a type of prezygotic barrier?

Question 4 4. A scientist notices several birds in the same area that are similar in appearance with the exception of different beak lengths. She observes that one type of bird with a particularly long beak can pick bugs out of holes in the ground, while the birds with shorter beaks cannot. The longer beak is an example of

Question 5 5. A new mutation allows a cheetah to run faster and hunt down more prey than its slower counterparts. This mutation increased the _____ of the cheetah.

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Question 6 6. One species of sea urchin is able to mate with another, but fertilization is rarely successful. What is this an example of?

Question 7 7. In order for speciation to occur a population's gene pool must:

Question 8 8. Which of the following is NOT a prerequisite for Hardy-Weinberg equilibrium?

Question 9 9. 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. What is the allelic frequency of the G allele?

Question 10 10.

Which of the following is an example of natural selection?

I. Albino animals are rare in nature because they are easy for predators to find.

II. The fastest gazelle is least likely to be eaten by a lion.

III. The gorilla that is strong enough to become alpha male is the most likely to pass on his genes.

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Question 11 11. The two types of speciation are:

Question 12 12.

Which of the following statements does NOT represent the idea of heritability by acquired characteristics?

I. A body builder develops stronger muscles during the course of his life, so his son will be strong as well.

II. A cat that lost its tail will produce offspring with shorter tails.

III. Over time, a population of heavily striped zebras increased over those without as much striping, as the heavily striped ones had a competitive advantage over the zebras with fewer stripes, and were, therefore, better able to reproduce.

Question 13 13. One way to overcome behavioral isolation that prevents animals from reproducing might be to _____.

Question 14 14.

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

I. Beneficial trait

II. Non-random mating

III. Large population size

Question 15 15.

Which of the following is an example of analogous structures or traits?

I. Leg bones of a human and leg bones of a penguin

II. Wing of a penguin and wing of a mosquito

III. Beak of a penguin and beak of a duck

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Question 16 16. In the Hardy-Weinberg equilibrium equation, p and q represent:

Question 17 17. A scientist mates two different organisms. She observes no offspring. A closer inspection reveals that the hybrid embryo does not develop properly. This is an example of _____.

Question 18 18. A postzygotic barrier is:

Question 19 19. Using the criteria outlined in the Hardy-Weinberg equilibrium, determine which of the following populations can be balanced.

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:

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Question 21 21. A population of lizards is split by an earthquake which leaves half of the population on an island and the other half on the tip of the peninsula. These lizards can't swim. What type of speciation will occur?

Question 22 22. Which of the following statements is true?

Question 23 23. A homologous structure is:

Question 24 24. Which of the following forces is LEAST likely to cause a new species to arise in a population?

Question 25 25. Which of the following is not associated with Darwinian evolution?

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Question 26 26. Some studies have shown that a single copy of the cystic fibrosis disease allele can confer resistance to tuberculosis to a person. This is an example of:

Question 27 27. The study of genetic variation within a population is called:

Question 28 28.

Select the statements about Hardy-Weinberg equilibrium that are true.

I. Hardy-Weinberg equilibrium is often found in the wild.

II. The allele frequency of a population in Hardy-Weinberg equilibrium does not change.

III. The Hardy-Weinberg equation predicts the evolutionary agent affecting a population.

Question 29 29. Two species of plants that do not cross-pollinate are an example of _____ isolation because they flower at different times of the year.

Question 30 30. Which of the following is NOT a principle of Darwin's theory of evolution?

Evolution: Theories and Principles 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!

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