MDCAT Biology MCQ #4541

A couple has a child with an X-linked recessive disorder. What is the probability that their next child will also have the disorder?

MDCAT Biology MCQ #4541

  1. Question 1

    Q1. A couple has a child with an X-linked recessive disorder. What is the probability that their next child will also have the disorder?

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

    Answer: 25%

    Explanation: 25%: each son has 25% chance of inheriting X-linked recessive allele.