Not a chromosoal breakage syndrome
Correct Answer: Duchenne muscular dystrophy
Description: Duchenne muscular dystrophy (DMD) is a genetic disorder characterized by progressive muscle degeneration and weakness. It is one of nine types of muscular dystrophy. DMD is caused by an absence of dystrophin, a protein that helps keep muscle cells intact. Symptom onset is in early childhood, usually between ages 3 and 5. The disease primarily affects boys, but in rare cases it can affect girls.DMD has an X-linked recessive inheritance pattern and is passed on by the mother, who is referred to as acarrier.
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