1. Unit 7 Genetics Review

2. 1.) A person that is heterozygous for type B blood has which of the following genotypes?
A. IBIB B. IAi C. ii D. IBi

3. 1.) A person that is heterozygous for type B blood has which of the following genotypes?
A. IBIB B. IAi C. ii D. IBi

4. 2. A diagram that traces the inheritance of a single gene throughout several generations of a family is called
A. A karyotype B. A pedigree C. A genetic map D. A genetograph

5. 2. A diagram that traces the inheritance of a single gene throughout several generations of a family is called
A. A karyotype B. A pedigree C. A genetic map D. A genetograph

6. 3. If a female fruit fly homozygous for white eyes (XrXr) is crossed with a red-eyed male (XRY), what percent of their offspring who have white eyes? 0%
25%
50%
75%

7. 3. If a female fruit fly homozygous for white eyes (XrXr) is crossed with a red-eyed male (XRY), what percent of their offspring who have white eyes?
Xr Xr 0%
25%
50%
75% XR y
XR Xr
XR Xr
Xr y
Xr y

8. 4. A heterozygous man for blood type B marries a woman heterozygous for blood type A. The chance that their first child will have type O blood is…
A. 0% B. 25% C. 50% D. 75%

9. 4. A heterozygous man for blood type B marries a woman heterozygous for blood type A. The chance that their first child will have type O blood is…
A. 0% B. 25% C. 50% D. 75%

10. 5. Sequence the following events of meiosis in the order in which they occur:
1. Homologous chromosomes line up along the equatorial plate
2. Sister chromatids separate from each other
3. The exchange of genetic material with homologous chromosomes
4. Homologous chromosomes separate from each other
5. The end of telophase I leads to haploid cells
1, 2, 4, 3, 5
4, 1, 2, 3, 5
3, 1, 4, 5, 2
2, 5, 1, 4, 3
4, 5, 2, 3, 1

11. 5. Sequence the following events of meiosis in the order in which they occur:
1. Homologous chromosomes line up along the equatorial plate
2. Sister chromatids separate from each other
3. The exchange of genetic material with homologous chromosomes
4. Homologous chromosomes separate from each other
5. The end of telophase I leads to haploid cells
1, 2, 4, 3, 5
4, 1, 2, 3, 5
3, 1, 4, 5, 2
2, 5, 1, 4, 3
4, 5, 2, 3, 1

12. 6. Meiosis results in
A. 2 diploid cells B. 4 diploid cells C. 2 haploid cells D. 4 haploid cells

13. 6. Meiosis results in
A. 2 diploid cells B. 4 diploid cells C. 2 haploid cells D. 4 haploid cells

14. 7. Which of the following represents the proportion and type of gametes produced by an individual with the genotype Pp?
A. ½ Pp and ½ PP B. ¾ Pp and ¼ pp C. ½ P and ½ p D. ¾ P and ¼ p E. ¼ P and ¾ p

15. 7. Which of the following represents the proportion and type of gametes produced by an individual with the genotype Pp?
A. ½ Pp and ½ PP B. ¾ Pp and ¼ pp C. ½ P and ½ p D. ¾ P and ¼ p E. ¼ P and ¾ p

16. 8. Brown is dominant to red. Right handedness is dominant to left
8. Brown is dominant to red. Right handedness is dominant to left. If two heterozygous parents have a child, what are the chances of having a red headed, left handed child?
1/16
2/16
4/16
9/16
12/16

17. 8. Brown is dominant to red. Right handedness is dominant to left
8. Brown is dominant to red. Right handedness is dominant to left. If two heterozygous parents have a child, what are the chances of having a red headed, left handed child?
1/16
2/16
4/16
9/16
12/16

18. 9. What is the goal of meiosis?
Produce cells with unique genetic material
Produce genetically identical cells
Create unique cells by introducing mutations
Repair and replace damaged cells

19. 9. What is the goal of meiosis?
Produce cells with unique genetic material
Produce genetically identical cells
Create unique cells by introducing mutations
Repair and replace damaged cells

20. 10. A man who is homozygous for curly hair and a woman who is homozygous for straight hair create a child who has wavy hair. Which type of inheritance pattern is shown?
Dominance
Incomplete dominane
Multiple alleles
Linkage
Crossing-over

21. 10. A man who is homozygous for curly hair and a woman who is homozygous for straight hair create a child who has wavy hair. Which type of inheritance pattern is shown?
Dominance
Incomplete dominane
Multiple alleles
Linkage
Crossing-over

22. 11. Why are sex-linked disorders most often observed in males?
The X chromosome only has genes for genetic disorders
The Y chromosome cannot have genes that cause genetic disorders
The Y chromosome can’t mask alleles on the x chromosome
The x chromosome has genes only for sex determination

23. 11. Why are sex-linked disorders most often observed in males?
The X chromosome only has genes for genetic disorders
The Y chromosome cannot have genes that cause genetic disorders
The Y chromosome can’t mask alleles on the x chromosome
The x chromosome has genes only for sex determination

24. 12. What does it mean if someone is a “carrier” of a disorder
The person passes on a disorder to another individual through close contact/ exposure
The person does not have the disorder, but will develop it later in life
The person does not have the disorder but can pass it on to future generations
The allele is not passed on due to the Y chromosome activation

25. 12. What does it mean if someone is a “carrier” of a disorder
The person passes on a disorder to another individual through close contact/ exposure
The person does not have the disorder, but will develop it later in life
The person does not have the disorder but can pass it on to future generations
The allele is not passed on due to the Y chromosome activation

26. 13. Which term describes the pair of alleles Dd?
Phenotype
Diploid
Haploid
Homozygous
Heterozygous

27. 13. Which term describes the pair of alleles Dd?
Phenotype
Diploid
Haploid
Homozygous
Heterozygous

28. 14. Which of the following cells is a diploid?
Egg Cell
Sperm Cell
Cheek cell
Gamete

29. 14. Which of the following cells is a diploid?
Egg Cell
Sperm Cell
Autosome
Gamete

30. 15. What is a diploid cell? Cell that has one copy of each chromosome
Cell that has two copies of each chromosome
Cell that has no chromosomes
None of the above

31. 15. What is a diploid cell? Cell that has one copy of each chromosome
Cell that has two copies of each chromosome
Cell that has no chromosomes
None of the above

32. 16. What is a haploid cell? Cell that has one copy of each chromosome
Cell that has two copies of each chromosome
Cell that has no chromosomes
None of the above

33. 16. What is a haploid cell? Cell that has one copy of each chromosome
Cell that has two copies of each chromosome
Cell that has no chromosomes
None of the above

34. 17. During metaphase 1 of meiosis…
Centromeres of replicated chromosomes line up along the cell’s equator
Centromeres divide as sister chromatids move toward opposite poles of the cell
Homologous chromosome pairs lineup along the cell’s equator
Homologous chromosomes move toward opposite poles of the cell

35. 17. During metaphase 1 of meiosis…
Centromeres of replicated chromosomes line up along the cell’s equator
Centromeres divide as sister chromatids move toward opposite poles of the cell
Homologous chromosome pairs lineup along the cell’s equator
Homologous chromosomes move toward opposite poles of the cell

36. 18. Nondisjuction can occur if __________ chromosomes fail to separate during meiosis I.
A. homologous B. heterozygous C. defective D. Sex E. Autosome

37. 18. Nondisjuction can occur if __________ chromosomes fail to separate during meiosis I.
A. homologous B. heterozygous C. defective D. Sex E. Autosome

38. 19. At the completion of meiosis II, there are _______ __________daughter cells
2 haploid
4 haploid
2 diploid
4 diploid

39. 19. At the completion of meiosis II, there are _______ __________daughter cells
2 haploid
4 haploid
2 diploid
4 diploid

40. 20. Why must crossing over occur?
It ensure that all cells underdoing meiosis remain identical
It assembles the spindle fibers and centrioles
It is a source of genetic variation
It creates multiple alleles

41. 20. Why must crossing over occur?
It ensure that all cells underdoing meiosis remain identical
It assembles the spindle fibers and centrioles
It is a source of genetic variation
It creates multiple alleles
Pairs of homologous chromosomes exchange segments

42. 21. Two heterozygous parents each has a dominant allele for X brown eyes and a recessive allele x for blue eyes. The phenotypic ratio is brown:blue eyes in their children is
A. 1:2:1 B. 3:1 C. 9:3:3:1 D. 1:3:1

43. 21. Two heterozygous parents each has a dominant allele for X brown eyes and a recessive allele x for blue eyes. The phenotypic ratio is brown:blue eyes in their children is
A. 1:2:1 B. 3:1 C. 9:3:3:1 D. 1:3:1

44. 22. In humans, meiosis occurs _____
Only in the reproductive organs
In all tissues
During growth and repair
All of the above

45. 22. In humans, meiosis occurs _____
Only in the reproductive organs
In all tissues
During growth and repair
All of the above

46. 23. Which of the above defines the term codominance?
Any of the alternate forms of a gene may have in a given gene pair or group
A heterozygous condition where both alleles are expressed
A heterozgyous condition in which a pair of alleles produces an intermediate blended phenotype
The observable physical characteristics of an organism
The combination of alleles resulting in a genetic makeup

47. 23. Which of the above defines the term codominance?
Any of the alternate forms of a gene may have in a given gene pair or group
A heterozygous condition where both alleles are expressed
A heterozygous condition in which a pair of alleles produces an intermediate blended phenotype
The observable physical characteristics of an organism
The combination of alleles resulting in a genetic makeup