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Home Q & A Board Biology-Related Homework Help Medicine Nursing and Clinical
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JamiLC JamiLC
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6 years ago
A nurse is assessing the knowledge of new parents with a child born with maple syrup urine disease. This is an autosomal recessive inherited disorder, which means that:
 
  1. both genes of a pair must be abnormal for the disorder to be expressed.
  2. only one copy of the abnormal gene is required for the disorder to be expressed.
  3. this disorder occurs in males and heterozygous females.
  4. this disorder is carried on the X chromosome.
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#1
6 years ago
1
1. Correct. 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.
2, 3, 4. Incorrect. MSUD is not an X-linked dominant or recessive disorder or an autosomal do-minant inheritance disorder. It is an autosomal recessive inheritance disorder in which both genes of a pair must be abnormal for the disorder to be expressed.
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