The inheritance of Duchenne muscular dystrophy in 25 families was studied with 13 X chromosome specific cloned DNA fragments from 10 loci in and surrounding Xp21. When multiple probes were informative, the meiotic exchange points for each meiosis were located in individual families. Neither genetic nor physical evidence indicates an unusually high recombination rate across Xp21 in these 25 families.
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Bertelson et al. (1986) studied this question.
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