KROK 1 2023 – Question 3 · KROK (Medicine) · Biology
The parents with normal hearing have two daughters and a son, who are congenitally deaf. Their other 5 children are healthy. What is the pattern of deafness inheritance in this case?
- A. Autosomal recessive
- B. Y-linked
- C. X-linked recessive
- D. Autosomal dominant
- E. X-linked dominant
Hint
Two unaffected parents producing affected children of both sexes points to a trait that stays hidden in carriers; consider how often such a pair transmits it.
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