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A recessive disorder preventing proper metabolism of phenylalanine and tyrosine is:
AAtherosclerosis
BAlkaptonuria
CAchondroplasia
DAgranulocytosis
Answer & Solution
Correct answer: B. Alkaptonuria
1. Affected people may pass brown urine.
2. Two amino acids are handled incorrectly.
3. That disorder is alkaptonuria.
_Source: OpenStax Biology 2e, Chapter 12, Mendel's Experiments and Heredity._
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