KROK 1 2019 – Question 42 · 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 dominant
- B. Y-linked
- C. X-linked recessive
- D. Autosomal recessive
- E. X-linked dominant
Hint
Compare the sex distribution of the affected children and the phenotype of both parents, and ask which modes of inheritance each observation rules out.
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