CLEP Biology Practice Exam

Category - Biology

An inherited metabolic disorder called phenylketonuria (PKU) can result in serious problems in infancy. The chance that two parents who are heterozygous will have a child with PKU is 25%.Which of the following terms best applies to the inheritance pattern for PKU?
  1. codominant
  2. dominant
  3. recessive
  4. sex-linked
Explanation
Answer: C - recessive
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