MDCAT Biology MCQ #4548

A couple has a child with cystic fibrosis, an autosomal recessive disorder. What is the probability that their next child will also have cystic fibrosis?

MDCAT Biology MCQ #4548

  1. Question 1

    Q1. A couple has a child with cystic fibrosis, an autosomal recessive disorder. What is the probability that their next child will also have cystic fibrosis?

    • A) 25%
    • B) 50%
    • C) 75%
    • D) 100%

    Answer: 25%

    Explanation: Autosomal recessive disorders have a 25% chance of being passed to offspring, option B is incorrect because it represents the chance of being a carrier.