Unit 7 Genetics Review

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

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

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

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

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%

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

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%

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%

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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