Concepts of Genetics (12th Edition)
12th Edition
ISBN: 9780134604718
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino, Darrell Killian
Publisher: PEARSON
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Textbook Question
Chapter 5, Problem 2CS
Given that the prenatal test can provide only a probability estimate that the fetus will develop autism, what ethical issues should be discussed with the parents?
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Students have asked these similar questions
At her first prenatal visit, a woman relates that her maternal aunt has cystic fibrosis, an autosomal recessive illness. Which of the following statements is appropriate for the nurse to make?
a. It is unnecessary for you to worry since our aunt is not a direct relation."
b. "We can check to see whether or not you are a carrier for cystic fibrosis."
c. "You should have an amniocentesis to see whether or not your child has the disease."
d. Please ask your mother whether she has ever had any symptoms of cystic fibrosis
Please answer with reason:
1) The nurse is explaining the inheritance of Huntington disease (autosomal dominant) to a newly diagnosed patient whose partner does not have the gene mutation. Which statement should the nurse make regarding family planning?
a. There is a 100% chance with each pregnancy that the child will inherit the gene for Huntington disease.
b. There is a 50% chance with each pregnancy that the child will inherit the gene for Huntington disease
c. There is a 25% chance with each pregnancy that the child will inherit the gene for Huntington disease
d. There is a 0% chance with each pregnancy that the child will inherit the gene for Huntington disease.
Imagine that you are in your late 30s or early 40s and decide that you want a child.
You realize that you’re at greater risk of having a child with Down’s Syndrome.
What sorts of genetic screening are available today? If you find out that this child has
this condition, do you think it’s appropriate to have an abortion? Why or why not?
Question: Does elective abortion of fetuses with physical or other developmental disabilities
have an effect on the perception of personhood, dignity, and rights in society?
Explain.
Chapter 5 Solutions
Concepts of Genetics (12th Edition)
Ch. 5 - In a family with one autistic child the risk for...Ch. 5 - Given that the prenatal test can provide only a...Ch. 5 - Consider two hypothetical recessive autosomal...Ch. 5 - With two pairs of genes involved (P/p and Z/z), a...Ch. 5 - In Drosophila, a heterozygous female for the...Ch. 5 - HOW DO WE KNOW? In this chapter, we focused on...Ch. 5 - Review the Chapter Concepts list on page 94. Most...Ch. 5 - Describe the cytological observation that suggests...Ch. 5 - Why does more crossing over occur between two...Ch. 5 - Explain why a 50 percent recovery of...
Ch. 5 - Why are double-crossover events expected less...Ch. 5 - What is the proposed basis for positive...Ch. 5 - What two essential criteria must be met in order...Ch. 5 - The genes dumpy (dp), clot (cl), and apterous (ap)...Ch. 5 - Colored aleurone in the kernels of com is due to...Ch. 5 - In the cross shown here, involving two linked...Ch. 5 - In a series of two-point mapping crosses involving...Ch. 5 - Two different female Drosophila were isolated,...Ch. 5 - In Drosophila, a cross was made between femalesall...Ch. 5 - Another cross in Drosophila involved the...Ch. 5 - In Drosophila, Dichaete (D) is a mutation on...Ch. 5 - Drosophila females homozygous for the third...Ch. 5 - In Drosophila, two mutations, Stubble (Sb) and...Ch. 5 - If the cross described in Problem 18 were made,...Ch. 5 - Are mitotic recombinations and sister chromatid...Ch. 5 - What possible conclusions can be drawn from the...Ch. 5 - An organism of the genotype AaBbCc was testcrossed...Ch. 5 - Based on our discussion of the potential...Ch. 5 - Traditional gene mapping has been applied...Ch. 5 - DNA markers have greatly enhanced the mapping of...Ch. 5 - In a certain plant, fruit is either red or yellow,...Ch. 5 - Two plants in a cross were each heterozygous for...Ch. 5 - A number of humanmouse somatic cell hybrid clones...Ch. 5 - A female of genotype produces 100 meiotic tetrads....Ch. 5 - In laboratory class, a genetics student was...Ch. 5 - Drosophila melanogaster has one pair of sex...Ch. 5 - In Drosophila, a female fly is heterozygous for...Ch. 5 - The gene controlling the Xg blood group alleles...Ch. 5 - Prob. 34ESP
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- Which three factors are crucial in the diagnosis of genetic defects in the fetal stage? What do you think weighs the most?arrow_forwardA couple contemplating a pregnancy are in today for an appointment at a genetic counselling clinic to identify and interpret their risk of an inherited disorder. The nurse explains during teaching that all the following are characteristic features of fragile X chromosome of a 3-year-old male child EXCEPT: a. Macroorchidism b. Autistic behavior c. Intellectual disability d. Characteristic facial features e. Hyperextensible finger jointsarrow_forwardWhat are newest advances in early diagnosis and confirmation of Huntington disease? Explain the difference in inheritance pattern and the frequency to have affected progeny in the case of these three inherited diseases: Huntington, Cystic fibrosis and Duchenne muscular dystrophy. What therapies can be used or recommended for patients experiencing any of these inherited diseases?arrow_forward
- Mrs. Xexy Lucero, G0, who is planning to become pregnant tells Nurse Sasha, "I am scared. My brother Zanjo, who was born 2 years after I was, died a month after he was born. My mother says that he had a very serious genetic defect. I don't know what to do." Which of the following responses are appropriate for Nurse Zasha to make? (Select all that apply). a. I Think your mother should make an appointment to meet with your obstetrician. I'm sure she knows a lot more about your brother's illness than she is telling you." b. There are a number of tests that can be performed during your pregnancy tO Screen the baby for genetic diseases." c. lt is almost impossible to figure out what happened way back then, but l'm sure everything will be fine with your baby." d. Do you think your mother would allow your brother's body to be unearthed so that it could be tested for the genetic disease? e. I will discuss your concerns with your Obstetrician. I am sure your doctor will refer you to agenetic…arrow_forwardSUBJECT: GENETICS Topic: Polygenic Inheritance Question: Discuss possible presentation why a given family with 12 children, has 7 variations/differences in terms of height (contributing alleles like AABBCCDDEEFF, non-contributing alleles, aabbccddeeff)arrow_forwardWhat is polygenic inheritance? Discuss the issues that make polygenicinheritance difficult to study.arrow_forward
- Create a hypothetical person and situation as a real life example to illustrate your position. Who is this person? How old is this person? What chromosomal abnormalities does this person have? How does genetic testing and counseling make this person’s life better or worse? Ultimately, should your hypothetical person seek genetic counseling?arrow_forwardWhich of the following is true regarding Expanded Newborn Screening, EXCEPT: I A. Expanded Newborn Screening (ENBS) is a simple procedure to find out if your baby has a congenital disorder that may lead to mental retardation or even death if left untreated. B. The Expanded Newborn Screening program increased the screening panel of disorders from six (6) to more than twenty-eight. C. The blood sample for ENBS may be collected by any of the following: physician, nurse, medical technologist or trained midwife. D. ENBS is available in hospitals, lying-ins, rural health units, health centers and some private clinics. Who can perform the Newborn Hearing Screening Test, EXCEPT: A. Audiometrists. B.Audiologists C.Chef D.Medical technologists What does positive screen means in Newborn Screening result? * A. A NEGATIVE SCREEN means that the newborn screening result is normal. B. A POSITIVE SCREEN means that the newborn must be brought back to his/her health practitioner for further testing. C. A…arrow_forwardYou met with two parents whose first child has sickle cell anemia. (The parents show no signs of the disease themselves). The mother comes to you in the third month of her second pregnancy, and wants to know if this child will also inherit the disease. As a genetics counselor, you are ready to evaluate this couple’s case by doing the following:1. Determine what the genotype of each parent is. Is this disease autosomal or sex-linked? Dominant or recessive?arrow_forward
- List different methods used to test for genetic abnormalities.arrow_forwardAnswer the following: a. what environmental factors may increase incidence of chromosomal abnormalities? Name at least three. b. for a couple, what is the significance of knowing chromosomal aberrations?arrow_forwardGive three arguments in support for aborting a child with a chromosomal aberration, and three arguments in choosing to let the child live.arrow_forward
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