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. Mitosis results in
A. 2 diploid cells B. 4 diploid cells C. 2 haploid cells D. 4 haploid cells

15. 7. Mitosis results in
A. 2 diploid cells B. 4 diploid cells C. 2 haploid cells D. 4 haploid cells

16. 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

17. 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

18. 10. A man who is heterozygous for curly hair and a woman who is heterozygous 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

19. 10. A man who is heterozygous for curly hair and a woman who is heterozygous 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

20. 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

21. 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

22. 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

23. 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

24. 13. What is gametogenesis? The fertilization of eggs
The development of polar bodies
The movement of sperm
The production of gametes

25. 13. What is gametogenesis? The fertilization of eggs
The development of polar bodies
The movement of sperm
The production of gametes

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

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

28. 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

29. 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

30. 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

31. 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

32. 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

33. 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

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

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

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

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

38. 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

39. 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

40. 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

41. 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

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

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

44. 23. Mitosis is characterized by ____ nuclear divisions1 2 3 4

45. 23. Mitosis is characterized by ____ nuclear divisions1 2 3 4