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Expectant parents of twins tell the nurse they are having fraternal twins and are asking the nurse what that means. Which reply of the nurse is correct?
- A. Your twins will both be boys.
- B. Your twins are called monozygotic.
- C. You have one placenta and one of each of the fetal membranes called the chorion and amnion.
- D. Your twins will be as alike as any two siblings.
Correct Answer: D
Rationale: Fraternal twins are dizygotic, meaning they are as genetically similar as any other siblings.
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The nurse is discussing genetically linked diseases with a couple planning a pregnancy. The female states, 'I am concerned because there is a history of sickle-cell disease in my family.' Which information from the nurse is correct?
- A. Any offspring will have the disease.
- B. Only male children will have the disease.
- C. The male partner needs genetic testing.
- D. The couple should not become pregnant.
Correct Answer: C
Rationale: The male partner should undergo genetic testing to determine if he is a carrier of the sickle-cell gene. This information guides the couple's reproductive decisions.
Match each term with its description. Embryoblast
- A. None
- B. None
- C. The fertilized egg as it separates into 2 parts, the embryoblast and trophoblast.
- D. None
Correct Answer: C
Rationale: Embryoblast is part of the developing embryo.
At approximately ___ weeks of gestation, lecithin is forming on the alveolar surfaces, the eyelids open, and the fetus measures approximately 27 cm crown to rump and weighs approximately 1110 g.
- A. 20
- B. 24
- C. 28
- D. 30
Correct Answer: C
Rationale: These milestones of human development occur at approximately 28 weeks.
The nurse must be cognizant that an individual's genetic makeup is known as his or her:
- A. Genotype.
- B. Phenotype.
- C. Karyotype.
- D. Chromotype.
Correct Answer: A
Rationale: The genotype comprises all the genes the individual can pass on to a future generation.
The nurse is providing education about the newborn to a pregnant person and the soon-to-be grandparents. What information is the most important for the nurse to discuss to assist the extended family in adapting to their new role?
- A. how to bathe the newborn
- B. extended family role expectations
- C. childbirth preparation
- D. breast-feeding
Correct Answer: B
Rationale: Addressing extended family role expectations helps them adapt to the newborn. Other choices focus on practical baby care.