Muscular dystrophies and mitochondrial myopathies Quiz: Ace Your Exams

Get ready to dominate your medical and nursing exams by using our dynamic quizzes to elevate your knowledge and increase your confidence. Whether you're gearing up for the USMLE®, COMLEX®, or your next in-class assessment, Osmosis quizzes tackle key topics in pathology, diagnostics, and treatment approaches. By honing in on clinical readiness and decision-making, we make sure the knowledge you gain empowers you both in the classroom and in real-world practice. Jump in and supercharge your exam prep!

Learning videos

Flashcards

Expert reviewed

Spaced Repetition

Mobile app

Custom Quizzes

1 of 8

A 3-year-old boy is brought to the office by his parents because of difficulty keeping up with other children at daycare. The parents report that he has difficulty climbing stairs and seems more tired and less interested in active play. The patient has a history of upper respiratory tract infections twice in the last year. Temperature is 37°C (98.6°F), pulse is 70/min, respirations are 19/min and blood pressure is 100/60 mmHg. Physical examination shows enlarged and nontender calves bilaterally. The rest of the examination is unremarkable. A genetic condition is suspected. The patient’s family pedigree with respect to this condition is shown with the red arrow indicating his position within the family.

A pedigree chart shows 3 generations. Circles are female, squares male. Filled shapes have trait. One square is grayed out, crossed. An arrow points to a filled square at the bottom.

Assuming that the genetic condition demonstrates complete penetrance, which of the following inheritance patterns is most likely in this patient?  

Elimination tool

Choose an option: