Original sentence: Becker's muscular dystrophy occurs in approximately 3 to 6 in 100,000 male births, making it much less common than Duchenne muscular dystrophy.Men who have Becker's muscular dystrophy can have children, and all their daughters are carriers, but none of the sons will inherit their father's mutation
Edited sentence: A significant number of Becker muscular dystrophy mutations are spontaneous and are not inherited from a parent.Becker muscular dystrophy occurs in approximately 3 to 6 in 100,000 male births, making it much less common than Duchenne muscular dystrophy.Men who have Becker muscular dystrophy can have children, and all their daughters are carriers, but none of the sons will inherit their father's mutation