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9/7/24, 6:44 C6 - maternal baby testPM bank
MATERNAL CHILD NURSING CARE 6TH EDITION PERRY TEST BANK
Chapter 06: Genetics, Conception, and Fetal Development
Perry: Maternal Child Nursing Care, 6th Edition
MULTIPLE CHOICE
1. A father and mother are carriers of phenylketonuria (PKU). Their 2-year-old daughter has
PKU. The couple tells the nurse that they are planning to have a second baby. Because their
daughter has PKU, they are sure that their next baby won’t be affected. What response by the
nurse is most accurate?
a.
“Good planning; you need to take advantage of the odds in your favor.”
b.
“I think you’d better check with your doctor first.”
c.
“You are both carriers, so each baby has a 25% chance of being affected.”
d.
“The ultrasound indicates a boy, and boys are not affected by PKU.”
ANS: C
The chance is one in four that each child produced by this couple will be affected by PKU
disorder. This couple still has an increased likelihood of having a child with PKU. Having one
child already with PKU does not guarantee that they will not have another. These parents need
to discuss their options with their physician. However, an opportune time has presented itself
for the couple to receive correct teaching about inherited genetic risks. No correlation exists
between gender and inheritance of the disorder because PKU is an autosomal recessive
disorder.
PTS: 1 DIF: Cognitive Level: Application OBJ: Nursing Process: Planning
MSC: Client Needs: Health Promotion and Maintenance
NURSINGTB.COM
2. The nurse is providing genetic counseling for an expectant couple who already have a child
with trisomy 18. The nurse should:
a.
tell the couple they need to have an abortion within 2 to 3 weeks.
b.
explain that the fetus has a 50% chance of having the disorder.
c.
discuss options with the couple, including amniocentesis to determine whether the
fetus is affected.
d.
refer the couple to a psychologist for emotional support.
ANS: C
Genetic testing, including amniocentesis, would need to be performed to determine whether
the fetus is affected. The couple should be given information about the likelihood of having
another baby with this disorder so that they can make an informed decision. A genetic
counselor is the best source for determining genetic probability ratios. The couple eventually
may need emotional support, but the status of the pregnancy must be determined first.
PTS: 1 DIF: Cognitive Level: Comprehension
OBJ: Nursing Process: Planning, Implementation
MSC: Client Needs: Physiologic Integrity
3. The nurse is assessing the knowledge of new parents with a child born with maple syrup urine
disease (MSUD). This is an autosomal recessive inherited disorder, which means that:
a.
both genes of a pair must be abnormal for the disorder to be expressed.
b.
only one copy of the abnormal gene is required for the disorder to be expressed.
c.
the disorder occurs in males and heterozygous females.
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, 9/7/24, 6:44 C6 - maternal baby test
PM bank
MATERNAL CHILD NURSING CARE 6TH EDITION PERRY TEST BANK
d.
the disorder is carried on the X chromosome.
ANS: A
MSUD is a type of autosomal recessive inheritance disorder in which both genes of a pair
must be abnormal for the disorder to be expressed. MSUD is not an X-linked dominant or
recessive disorder or an autosomal dominant inheritance disorder.
PTS: 1 DIF: Cognitive Level: Comprehension
OBJ: Nursing Process: Assessment MSC: Client Needs: Health Promotion and Maintenance
4. In presenting to obstetric nurses interested in genetics, the genetic nurse identifies the primary
risk(s) associated with genetic testing as:
a.
anxiety and altered family relationships.
b.
denial of insurance benefits.
c.
high false-positive results associated with genetic testing.
d.
ethnic and socioeconomic disparity associated with genetic testing.
ANS: B
Decisions about genetic testing are shaped by socioeconomic status and the ability to pay for
the testing. Some types of genetic testing are expensive and are not covered by insurance
benefits. Anxiety and altered family relationships, high false-positive results, and ethnic and
socioeconomic disparity are factors that may be difficulties associated with genetic testing,
but they are not risks associated with testing.
PTS: 1 DIF: Cognitive Level: Comprehension
OBJ: Nursing Process: Implementation MSC: Client Needs: Health Promotion and Maintenance
5. A man’s wife is pregnant for the tNhiUrdRStiImNGeT. OB.nCeOcMhild was born with cystic
fibrosis, and the other child is healthy. The man wonders what the chance is that this child
will have cystic fibrosis. This type of testing is known as:
a.
occurrence risk.
b.
recurrence risk.
c.
predictive testing.
d.
predisposition testing.
ANS: B
The couple already has a child with a genetic disease so they will be given a recurrence risk
test. If a couple has not yet had children but are known to be at risk for having children with a
genetic disease, they are given an occurrence risk test. Predictive testing is used to clarify the
genetic status of an asymptomatic family member. Predisposition testing differs from
presymptomatic testing in that a positive result does not indicate 100% risk of a condition
developing.
PTS: 1 DIF: Cognitive Level: Comprehension OBJ: Nursing Process: Planning
MSC: Client Needs: Health Promotion and Maintenance
6. A key finding from the Human Genome Project is:
a.
approximately 20,500 genes make up the genome.
b.
all human beings are 80.99% identical at the DNA level.
c.
human genes produce only one protein per gene; other mammals produce three
proteins per gene.
d.
single gene testing will become a standardized test for all pregnant patients in the
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