Ch 5 Modern Genetics Part 2: Question Preview (ID: 22490)


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Why can’t a male be a carrier of colorblindness?
a) Colorblindness is on the Y chromosome and since he only has 1 Y chromosome he would have the trait, not just be a carrier. b) Colorblindness is on the X chromosome and since he only has 1 X chromosome he would have the trait, not just be a carrier. c) Colorblindness is on the X chromosomes and he would just be a carrier. d) Colorblindness is on the X chromosomes has 2 X chromosomes he would have the trait.
Why can a karyotype detect Down syndrome but not hemophilia?
a) Hemophilia is at the chromosome level so it will show on the karyotpye. b) Karyotype shows chromosomes andHemophilia is an extra chromosome for the 21st pair so you can see it on a karyotype. c) Karyotype shows chromosomes and Down Syndrome is an extra chromosome for the 21st pair so you can see it on a karyotype. d) Karyotype shows allels and Down Syndrome is an extra allele for the 21st pair so you can see it on a karyotype.
Explain how bacteria can be genetically engineered to produce a human protein such as insulin.
a) Put human insulin gene in bacteria and offspring will produce insulin. b) Put human insulin gene in bacteria and offspring will produce the genes for genetic engineering.. c) Put human insulin gene in bacteria cell it will produce insulin. d) Put bacteria in human and it will produce insulln.
Is the pedigree shown on your study guide consistent with the pattern you might expect for a sex-linked trait controlled by a recessive allele? Explain your answer.
a) No, because many males are carriers and more females have the trait so it is a sex-linked trait. b) No, because many females are carriers and more males have the trait so it is a sex-linked trait. c) Yes, because many males are carriers and more females have the trait so it is a sex-linked trait. d) Yes, because many females are carriers and more males have the trait so it is a sex-linked trait.
Using the pedigree on your study guide, # 12 could have inherited the trait, but by chance he did not. Explain why males 5 and 13 could not have inherited the trait.
a) # 5 13 could not have inherited the trait because their moms are not carriers and they get their X chromosome from mom b) # 5 13 could not have inherited the trait because their moms are not carriers and they get their X chromosome from dad c) # 5 13 could not have inherited the trait because their moms have the trait and they get their X chromosome from mom d) # 5 13 could not have inherited the trait because their dads have the trait and they get their Y chromosome from mom
Why is genetic engineering sometimes called gene splicing
a) It is dicing the gene up and rearranging them b) It is splicing the genes apar.t c) It is dicing them and connecting them back together with each other. d) It is splicing genes into chromosomes with others genes.
What is cystic fibrosis, and what causes it?
a) Cystic Fibrosis is an abnormal amount of thick mucus in the Lungs and Intestines. It is caused by recessive alleles. b) Cystic Fibrosis is where the blood does not clot well and it is caused by recessive alleles. c) Cystic Fibrosis is where the blood clots too often it is is caused by recessive alleles. d) Cystic Fibrosis is where the person has some mental retardation and heart trouble is an extra chromosome 21.
Janice’s mother has type AB blood, and her father has type O blood. What blood type(s) could Janice have? Draw a Punnett square to explain your answer.
a) Punnett square and Janice could have type A blood, type B blood or type AB blood. b) Punnett square and Janice could have type AB blood. c) Punnett square and Janice could have type A blood or type B blood. d) Punnett square and Janice could have type A blood, type B blood or O type blood.
Smile dimples are controlled by a dominant allele on a single gene. Whitney has smile dimples, but her husband Alberto and son Pedro do not. What is the chance that Whitney and Alberto’s next child will have smile dimples? Draw a Punnett square to sh
a) Punnett Square the next child has a 0% chance of having smile dimples. b) Punnett Square the next child has a 25% chance of having smile dimples. c) Punnett Square the next child has a 50% chance of having smile dimples. d) Punnett Square the next child has a 100% chance of having smile dimples.
Although Janele’s blood is normal, her brother Randy has sickle-cell disease. Janele is worried about having a child with the disease. Janele just found out that her husband Terence has one allele for sickle-cell disease. As their genetic counselor,
a) Punnett Square and the child has 0% chance of hiving sickle-cell disease but a 50% chance of being a carrier. b) Punnett Square and the child has 0% chance of hiving sickle-cell disease but a 100% chance of being a carrier. c) Punnett Square and the child has 0% chance of hiving sickle-cell disease and 0% chance of being a carrier. d) Punnett Square and the child has 50% chance of hiving sickle-cell disease but a 50% chance of being a carrier.
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