Which inheritance pattern requires only one mutated gene to cause a disorder?
X-linked recessive
Mitochondrial
Autosomal recessive
Autosomal dominant
The Correct Answer is D
(A) X-linked recessive: Requires two mutated genes in females or one in males (e.g., hemophilia, Duchenne muscular dystrophy).
(B) Mitochondrial: Inherited only from the mother, affects energy production.
(C) Autosomal recessive: Requires two copies of a mutated gene (one from each parent) to cause disease (e.g., cystic fibrosis, sickle cell anemia).
(D) Autosomal dominant: A single copy of a mutated gene from one parent is enough to cause a disorder. Examples include Huntington’s disease and Marfan syndrome.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
(A) Obtain a urine specimen: Important for diagnosis but not the priority over pain management.
(B) Administer prescribed analgesics: Pain relief is the priority in acute urolithiasis, as renal colic is excruciating.
(C) Encourage oral fluids: Helps prevent further stone formation but is secondary to pain relief.
(D) Prepare the patient for surgery: Surgery is only indicated for large, obstructing stones, not a first-line intervention.
Correct Answer is ["D","E"]
Explanation
(A) Serum Glucose Levels: Mannitol does not significantly affect glucose metabolism.
(B) Heart Rate: It does not directly impact heart rate, though secondary effects like dehydration may influence it.
(C) Respiration Rate: Mannitol does not directly impact respiratory function.
(D) Urine Output: Mannitol is an osmotic diuretic that increases urine output. Monitoring urine output helps assess the drug’s effectiveness and prevent dehydration or hypovolemia.
(E) Serum Potassium Levels: Mannitol causes diuresis, which can lead to electrolyte imbalances, including hypokalemia. Monitoring potassium levels helps prevent complications like arrhythmias.
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