1. Preview Chapter 16 Multiple Choice Short Response Extended Response
Standardized Test Prep
Preview
Multiple Choice
Short Response
Extended Response

2. Chapter 16 Multiple Choice
Standardized Test Prep
Multiple Choice
1. What is the term for the total genetic information in a population?
A. gene pool
B. allele frequency
C. distribution of traits
D. phenotype frequency

3. Multiple Choice, continued
Chapter 16
Standardized Test Prep
Multiple Choice, continued
1. What is the term for the total genetic information in a population?
A. gene pool
B. allele frequency
C. distribution of traits
D. phenotype frequency

4. Multiple Choice, continued
Chapter 16
Standardized Test Prep
Multiple Choice, continued
2. Saint Bernards and Chihuahuas (two breeds of domestic dogs) cannot normally mate because they differ so much in size. Thus, they are reproductively isolated to some extent. What type of isolating mechanism is operating in this case?
F. artificial
G. prezygotic
H. postzygotic
J. geographic

5. Multiple Choice, continued
Chapter 16
Standardized Test Prep
Multiple Choice, continued
2. Saint Bernards and Chihuahuas (two breeds of domestic dogs) cannot normally mate because they differ so much in size. Thus, they are reproductively isolated to some extent. What type of isolating mechanism is operating in this case?
F. artificial
G. prezygotic
H. postzygotic
J. geographic

6. Multiple Choice, continued
Chapter 16
Standardized Test Prep
Multiple Choice, continued
3. How do mutations affect genetic equilibrium?
A. Mutations cause emigration.
B. Mutations cause immigration.
C. Mutations introduce new alleles.
D. Mutations maintain genotype frequency.

7. Multiple Choice, continued
Chapter 16
Standardized Test Prep
Multiple Choice, continued
3. How do mutations affect genetic equilibrium?
A. Mutations cause emigration.
B. Mutations cause immigration.
C. Mutations introduce new alleles.
D. Mutations maintain genotype frequency.

8. Multiple Choice, continued
Chapter 16
Standardized Test Prep
Multiple Choice, continued
The illustration below
shows two contrasting models for rates of speciation. Use the illustration to answer the questions that follow.
4. Which model of speciation rates is illustrated by model A in the graph?
F. gradualism
G. sexual selection
H. disruptive selection
J. punctuated equilibrium

9. Multiple Choice, continued
Chapter 16
Standardized Test Prep
Multiple Choice, continued
The illustration below
shows two contrasting models for rates of speciation. Use the illustration to answer the questions that follow.
4. Which model of speciation rates is illustrated by model A in the graph?
F. gradualism
G. sexual selection
H. disruptive selection
J. punctuated equilibrium

10. Multiple Choice, continued
Chapter 16
Standardized Test Prep
Multiple Choice, continued
The illustration below
shows two contrasting models for rates of speciation. Use the illustration to answer the questions that follow.
5. Which model of speciation rates is illustrated by model B in the graph?
A. gradualism
B. sexual selection
C. disruptive selection
D. punctuated equilibrium

11. Multiple Choice, continued
Chapter 16
Standardized Test Prep
Multiple Choice, continued
The illustration below
shows two contrasting models for rates of speciation. Use the illustration to answer the questions that follow.
5. Which model of speciation rates is illustrated by model B in the graph?
A. gradualism
B. sexual selection
C. disruptive selection
D. punctuated equilibrium

12. Multiple Choice, continued
Chapter 16
Standardized Test Prep
Multiple Choice, continued
6. genotype : allele :: phenotype :
F. trait
G. mutation
H. gene pool
J. population

13. Multiple Choice, continued
Chapter 16
Standardized Test Prep
Multiple Choice, continued
6. genotype : allele :: phenotype :
F. trait
G. mutation
H. gene pool
J. population

14. Multiple Choice, continued
Chapter 16
Standardized Test Prep
Multiple Choice, continued
The illustration below shows the occurrence of variations in a particular characteristic within a population. The dark line represents an earlier point in time than the dashed line. Use the illustration to answer the question that follows.
7. Which type of selection is modeled in the illustration?
A. sexual selection
B. disruptive selection
C. stabilizing selection
D. directional selection

15. Multiple Choice, continued
Chapter 16
Standardized Test Prep
Multiple Choice, continued
The illustration below shows the occurrence of variations in a particular characteristic within a population. The dark line represents an earlier point in time than the dashed line. Use the illustration to answer the question that follows.
7. Which type of selection is modeled in the illustration?
A. sexual selection
B. disruptive selection
C. stabilizing selection
D. directional selection

16. Chapter 16 Short Response
Standardized Test Prep
Short Response
Explain the difference between reproductive isolation and geographic isolation.

17. Short Response, continued
Chapter 16
Standardized Test Prep
Short Response, continued
Explain the difference between reproductive isolation and geographic isolation.
Answer:
Reproductive isolation results from the separation of population subgroups by barriers that prevent breeding. Geographic isolation results from the separation of population subgroups by only geographic barriers.

18. The phrase Hardy-Weinberg genetic equilibrium
Chapter 16
Standardized Test Prep
Extended Response
The phrase Hardy-Weinberg genetic equilibrium
refers to the frequency of genotypes in populations from generation to generation.
Part A Briefly describe what this model predicts about genotype frequencies.
Part B What are the set of assumptions that must be met for the Hardy-Weinberg genetic equilibrium to be valid?

19. Extended Response, continued
Chapter 16
Standardized Test Prep
Extended Response, continued
Answer:
Part A The allele and genotype frequencies will stay the same from generation to generation unless acted upon by an outside influence.
Part B In order for the Hardy-Weinberg genetic equilibrium to be valid five conditions must be met: no mutations; there is no gene flow; the population is large; individuals mate randomly; and selection does not occur.