Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN: 9781305251052
Author: Michael Cummings
Publisher: Cengage Learning
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Chapter 16, Problem 18QP
a.
Summary Introduction
To determine: The possible method to handle the scenario in which an individual should contact the proband beforehand to explain the results and the implications of the results.
Introduction: A couple has undergone a prenatal test in which the young woman (proband) is found to have the sickle cell trait (Ss), and her partner does not have the sickle cell anemia (SS). The woman’s family has a family history of sickle cell anemia. Their prenatal tests indicate that the fetus is affected with sickle cell anemia (ss) and the only way it is possible is when the woman’s partner is not the father of the fetus.
b.
Summary Introduction
To determine: Whether it is appropriate to keep the information from the partner as he believes he is the father of the baby and the other problems related to this case.
Introduction: A couple has undergone a prenatal test in which the young woman (proband) is found to have the sickle cell trait (Ss), and her partner does not have the sickle cell anemia (SS). The woman’s family has a family history of sickle cell anemia. Their prenatal tests indicate that the fetus is affected with sickle cell anemia (ss) and the only way it is possible is when the woman’s partner is not the father of the fetus.
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2) Indicate the pattern of inheritance for the human genetic disorders. Use letter symbols for your answers (AR, AD, XR,XD, M) where appropriate.
Table 2.
HUMAN GENETIC DISORDER
PATTERN OF INHERITANCE
Marfan Syndrome
Sickle Cell Anemia
Classical Hemophilia
Hypophosphatemia
Cystic Fibrosis
Phenylketonuria
Huntington’s Disease
Tay Sachs Disease
Neurofibromatosis
Alkaptonuria
Xeroderma pigmentosum
Kearns-Sayre Syndrome
Achondroplasia
Beta thalassemia
Duchene Muscular Dystrophy
A couple is planning a family, but since each has a brother having the sickle-cell disorder, they are worried that their kids might develop the disorder too. Neither of them nor their respective parents have the disorder. Which of the following will be your smartest advice as a genetic counsellor?
One of four of their children can be expected to have sickle cell.
It is possible that none of their kids will have the disorder, but tests should be carried out on both of them to confirm.
All of their children will have sickle-cell disorder.
There is no chance of any of their kids having sickle cell.
Two mothers give birth to sons at the same time at a busy urban hospital. The son of mother 1 is afflicted with hemophilia. Neither parent has the disease. Mother 2 has a normal son, despite the fact that the father has hemophilia. Several years later, couple 1 sues the hospital, claiming that these two newborns were swapped in the nursery following their birth. As a genetic counselor, you are called to testify. What information can you provide the jury concerning the allegation?
Chapter 16 Solutions
Human Heredity: Principles and Issues (MindTap Course List)
Ch. 16.5 - Should fertility clinics be required to disclose...Ch. 16.5 - Prob. 2EGCh. 16 - Would ISCI be an option? Why or why not? Jan, a...Ch. 16 - Jan is concerned about using ART. She wants to be...Ch. 16 - List the common infertility problems in women....Ch. 16 - Prob. 2QPCh. 16 - Prob. 3QPCh. 16 - What is the difference between gamete...Ch. 16 - Why should women consider collecting and freezing...Ch. 16 - Prob. 6QP
Ch. 16 - Researchers are learning how to transfer...Ch. 16 - Prob. 8QPCh. 16 - Cystic fibrosis is an autosomal disease that...Ch. 16 - Prob. 10QPCh. 16 - Gene therapy involves: a. the introduction of...Ch. 16 - In selecting target cells to receive a transferred...Ch. 16 - The prospect of using gene therapy to alleviate...Ch. 16 - Is gene transfer a form of eugenics? Is it...Ch. 16 - A couple who wishes to have children visits you, a...Ch. 16 - A couple has had a child born with...Ch. 16 - You are a genetic counselor, and your patient has...Ch. 16 - Prob. 18QP
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- Another couple is concerned their child will be born with sickle cell anemia. The woman does not have sickle cell anemia. The woman’s mother had sickle cell anemia and her father was a carrier of the sickle cell gene. The man knows that he is not a carrier of the sickle cell gene. What is the probability that the child will be a carrier of sickle cell anemia?arrow_forwardAs a genetic counselor, you inform Susan and John that a blood test for cystic fibrosis is available. would you recommend generic testing for Susan and John?arrow_forwardThe gene for polydactyly (P) is autosomal and dominant to normal fingers (p). Hemophilia is sex-linked and recessive (X h ). A man and his wife both of whom are polydactylous and have normal red blood cells have a child who is non-polydactylous and with hemophilia. What are their genotypes?arrow_forward
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- In man, muscular dystrophy is a condition in which the muscles waste away during early life and may result in a shorter life expectancy. It is due to a sex-linked, recessive gene. A certain couple has five children – three boys (ages 1yr, 3yrs, and 10yrs old) and two girls (ages 5yrs and 7yrs old). The oldest boy shows the symptoms of this disease. You are their family physician and they come to you for advice. What would you tell them about the chances of their other children developing the disease?arrow_forwardPlease help me with the following question: Von Willebrand disease is an inherited bleeding disorder. People with von Willebrand disease take a much longer period for blood to clot/stop than others. von Willebrand disease is either inherited in an autosomal dominant pattern or in an autosomal recessive pattern. Question: what is the genotype of the disorder? what are the phenotypic effects of the disorder? What is happening with the DNA to cause the phenotypic effects?arrow_forwardThere are six types of agglutinogen named C,D, E and c,d,e.the first three are dominant and last three are recessive.discussarrow_forward
- A young lady requested pre-marital genetic counselling because her sister had died in infancy of gangliosidosis, an autosomal recessive disease. What is the risk that this young lady has similarly affected offspring? What advice should be given?arrow_forwardA genetic counsellor is working with a couple who have just had a child who has a debilitating autosomal recessive form of a disease termed epidemolysis bullosa (which causes severe external and internal skin fragility resulting in blistering etc). Neither parent has epidemolysis bullosa, nor does anyone in their families. What should the counsellor say to this couple? OA. "Because no one in either of your families has epidemolysis bullosa, you are not likely to have another baby with epidemolysis bullosa. You can safely have another child." OB. "Because you have had one child with epidemolysis bullosa, you must each carry the allele. Any child you have has a 50% chance of having the disease." OC. "Because you have had one child with epidemolysis bullosa, you must each carry the allele. Any child you have has a 25% chance of having the disease." OD. "Because you have had one child with epidemolysis bullosa, you must both carry the allele. However, since the chance of having an affected…arrow_forwardAs a genetic counselor, you inform Susan and John that a blood test for cystic fibrosis is available. Would you recommend genetic testing for Susan and John? Explain.arrow_forward
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