Genetics & Inheritance MCAT Practice Question
A 28-year-old woman presents for genetic counseling after her brother was recently diagnosed with cystic fibrosis (CF). She is planning to conceive with her husband, who has no family history of CF. The patient's parents are both unaffected. CF is an autosomal recessive disorder caused by mutations in the CFTR gene. Based on this family history, what is the probability that the patient's next child will have cystic fibrosis?
Answer choices
- A0%
- B12.5%Correct answer
- C25%
- D50%
- E75%
- F100%
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