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A pregnant woman’s brother was diagnosed with Duchenne’s muscular dystrophy (DMD). She has already been tested and knows that she is a DMD carrier. After a sonogram and karyotyping, she discovers the sex of the baby and decides to proceed with further genetic testing to find out if the baby is also suffering from DMD.

Did she decide to do this testing based on the sex of the baby? What are the chances that her child would suffer from DMD if he was male?


Yes, 25%.


No, 0%.


Yes, 100%.


Yes, 50%.


Yes, 0%.

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