Which of the following is a characteristic feature of X-linked recessive disorders?
Fathers can pass the disorder to their sons.
Carrier females rarely show symptoms.
Equal male and female prevalence.
All daughters of affected males are carriers.
The Correct Answer is D
(A) Fathers can pass the disorder to their sons: Incorrect because fathers pass the Y chromosome to sons, not the X.
(B) Carrier females rarely show symptoms: While carrier females often do not show symptoms due to having one unaffected X chromosome, it is not a defining feature.
(C) Equal male and female prevalence: Incorrect because X-linked recessive disorders affect males more frequently, as they only have one X chromosome.
(D) All daughters of affected males are carriers: Since males have only one X chromosome, they pass their X chromosome to all daughters, making them carriers.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
(A) Restrict the patient’s fluid intake: Fluid restrictions are important but not the priority during administration. Monitoring for adverse effects like ototoxicity is more critical.
(B) Ensure the patient voids before administration: Furosemide is a diuretic, but voiding before administration is not required.
(C) Administer the dose rapidly to achieve quick results: Rapid IV push can cause ototoxicity and hypotension. It should be given slowly over 1-2 minutes.
(D) Monitor the patient for tinnitus: High-dose or rapid IV administration of furosemide can cause ototoxicity, leading to tinnitus and hearing loss.
Correct Answer is C
Explanation
(A) Prevent constipation: Calcium channel blockers can cause constipation, but metoprolol does not prevent it.
(B) Minimize gingival hyperplasia: Gingival hyperplasia is a side effect of calcium channel blockers, but metoprolol does not counteract it.
(C) Prevent recurrent chest pain: Nifedipine can cause reflex tachycardia, which increases myocardial oxygen demand. Metoprolol (a beta-blocker) prevents this by slowing the heart rate and reducing myocardial workload, thereby preventing angina.
(D) Reduce flushing: Flushing is a side effect of nifedipine, but metoprolol is not used for this purpose.
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