1. Biology Final Exam Review

2. When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _____ occurs.
a. crossing over c. hybridization
b. mutagenesis d. fertilization

3. A

4. Which of the following describes an organism that has the genotype Bb?
a. homozygous c. inbreed
b. heterozygous d. all of these

5. B

6. Mendel's law of segregation states that during meiosis, the factors that control each trait separate, and only _____ from each pair is/are passed to the offspring.
a. one factor c. two factors
b. the dominant trait d. the recessive trait

7. A

8. The passing on of traits from parents to offspring is called _____.
a. genetics c. inbreeding
b. heredity d. gene splicing

9. B

10. A couple has two children, both of whom are boys
A couple has two children, both of whom are boys. What is the chance that the parents' next child will be a boy?
a. 0% c. 25%
b. 50% d. 75%

11. B

12. The numbers in Figure 10-1 represent the chromosome number found in each of the dog cells shown. The processes that are occurring at A and B are _____.
Figure 10-1
a. mitosis and fertilization c. mitosis and pollination
b. meiosis and fertilization d. meiosis and pollination

13. B

14. In mink, brown fur color is dominant to silver-blue fur color
In mink, brown fur color is dominant to silver-blue fur color. If a homozygous brown mink is mated with a silver-blue mink and 8 offspring are produced, how many would be expected to be silver-blue?
a. 0 c. 6
b. 3 d. 8

15. A

16. The diagram in Figure 10-2 shows a diploid cell with two homologous pairs of chromosomes. Due to independent assortment, the possible allelic combinations that could be found in gametes produced by the meiotic division of this cell are _____.
Figure 10-2
a. Bb, Dd, BB, and DD c. BbDd and BDbd
b. BD, bD, Bd, and bd d. Bd and bD only

17. B

18. What is the genotype of generation 1 in Figure 10-5?
a. II c. ii
b. Ii d. I

19. B

20. What is the phenotype of generation 1 in Figure 10-5?
a. II c. inflated
b. Ii d. constricted

21. C

22. a. MMXX, MMXx, MmXX, MmXx c. mMXX, mMXx, mmXX, mmXx
How should the top row of Figure 10-7 read?
a. MMXX, MMXx, MmXX, MmXx c. mMXX, mMXx, mmXX, mmXx
b. MMxX, MMxx, MmxX, Mmxx d. mMxX, mMxx, mmxX, mmxx

23. A

24. In Figure 10-8, what gametes will result if there is only a single crossover?
a. A c. C
b. B d. D

25. A

26. In Figure 10-8, what gamaetes will result if each chromatid crossed with a nonsister chromatid?
a. A c. C
b. B d. D

27. C

28. Ribosomes are made of _____.
a. rRNA and protein c. rRNA and mRNA
b. tRNA and mRNA d. protein and tRNA

29. A

30. Which of the following would be least likely to happen as a result of a mutation in a person's skin cells?
a. skin cancer
b. reduced functioning of the skin cell
c. no change in functioning of the skin cell
d. the person's offspring have mutated skin

31. D

32. A DNA nucleotide may be made up of a phosphate group, along with _____.
a. deoxyribose sugar and uracil c. deoxyribose sugar and thymine
b. ribose sugar and adenine d. ribose sugar and cytosine

33. C

34. Which series is arranged in order from largest to smallest in size?
a. chromosome, nucleus, cell, DNA, nucleotide
b. cell, nucleus, chromosome, DNA, nucleotide
c. nucleotide, chromosome, cell, DNA, nucleus
d. cell, nucleotide, nucleus, DNA, chromosome

35. B

36. X rays, ultraviolet light, and radioactive substances that can change the chemical nature of DNA are classified as _____.
a. growth regulators c. hydrolytic enzymes
b. metamorphic molecules d. mutagens

37. D

38. In which part of the cell does this process shown in Figure 11-1 take place?
a. in the nucleus c. at the ribosomes
b. in food vacuoles d. on the chromosome

39. C

40. Help Wanted
Positions Available in the genetics industry. Hundreds of entry-level openings for tireless workers. No previous experience necessary. Must be able to transcribe code in a nuclear environment. The ability to work in close association with ribosomes is a must.
Accuracy and Speed vital for this job in the field of translation. Applicants must demonstrate skills in transporting and positioning amino acids. Salary commensurate with experience.
Executive Position available. Must be able to maintain genetic continuity through replication and control cellular activity by regulation of enzyme production. Limited number of openings. All benefits.
Supervisor of production of proteins—all shifts. Must be able to follow exact directions from double-stranded template. Travel from nucleus to the cytoplasm is additional job benefit.
Table 11-1
Applicants for the fourth job of the Help Wanted ad in Table 11-1, "Supervisor," could qualify if they were _____.
a. DNA c. tRNA
b. mRNA d. rRNA

41. B

42. Applicants for the second job of the Help Wanted ad in Table 11-1, "Accuracy and Speed," could qualify if they were _____.
a. DNA c. tRNA
b. mRNA d. rRNA

43. C

44. Which structure shown in Figure 11-3 is a pyrimidine?
a. A c. C
b. B d. D

45. B

46. Which structure shown in Figure 11-3 does not contain a nitrogenous base?
a. A c. C
b. B d. D

47. D

48. What will be the result of the mutation in Figure 11-4?
a. it will have no affect on protein function
b. only one amino acid will change
c. nearly every amino acid in the protein will be changed
d. the organism will die

49. C

50. The type of inheritance shown when a red-flowering plant is crossed with a white-flowering plant and only pink-flowering plants are produced is _____.
a. inbreeding c. polygenic inheritance
b. incomplete dominance d. codominance

51. B