A 9-year-old boy has two years of worsening exercise intolerance, drooping eyelids and newly fitted hearing ai…

Question

A 9-year-old boy has two years of worsening exercise intolerance, drooping eyelids and newly fitted hearing aids. You take a family history to draw a pedigree. His mother wears a hearing aid and tires easily. Her brother developed diabetes and deafness at 32, but his three children, two of them girls, are all well. Their own mother needed a walking frame in her fifties. The boy's sister has milder hearing loss. Nobody on the father's side is affected. Which one of the following inheritance patte…

Accepted Answer

Mitochondrial

Answer

Autosomal dominant

Answer

Autosomal recessive

Answer

X-linked dominant

Answer

X-linked recessive

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