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:
The disorder occurs in males and heterozygous females.
The disorder is carried on the X chromosome.
Both genes of a pair must be abnormal for the disorder to be expressed.
Only one copy of the abnormal gene is required for the disorder to be expressed.
The Correct Answer is C
Both genes of a pair must be abnormal for the disorder to be expressed. In autosomal recessive inheritance, the gene for the disorder is located on an autosome (any chromosome other than a sex chromosome) and a person must inherit two copies of the abnormal gene (one from each parent) in order for the disorder to be expressed. If a person inherits only one copy of the abnormal gene, they are a carrier of the disorder but do not typically show symptoms.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
The Web of Causation model would be best for studying the complex relationships among factors that contribute to chronic disease. This model recognizes that chronic diseases result from the interplay of multiple factors at different levels, including individual, environmental, and societal factors. The model illustrates the complexity of these relationships and can help identify potential points for intervention.
Correct Answer is D
Explanation
The biophysical profile (BPP) would yield more detailed information about the fetus in this scenario. The BPP is a prenatal ultrasound evaluation that assesses fetal well-being by evaluating five biophysical variables: fetal breathing movements, fetal movements, fetal tone, amniotic fluid volume, and fetal heart rate. The BPP is a more detailed assessment of fetal well-being compared to a nonstress test and can provide valuable information about the fetus's overall health and well-being, including any potential issues or difficulties.
MSAFP screening is a blood test that can detect certain fetal abnormalities, but it does not provide detailed information about fetal well-being.
Percutaneous umbilical blood sampling (PLBS) is an invasive test that is used to obtain a sample of fetal blood for testing in cases of suspected fetal anemia or other blood disorders. Ultrasound for fetal anomalies is a diagnostic tool used to detect structural abnormalities or defects in the fetus. While it can provide some information about fetal well-being, it is not as comprehensive as the BPP in evaluating fetal health and wellness.
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