DNA tests

posted on February 1, 2001 - 11:54am
One area that causes frequent misunderstanding is the phenomenon of germ line mosaicism. Here's a typical question (actually a composite of several queries to "Ask the Experts"): Five years ago, I gave birth to a child with Duchenne muscular dystrophy (DMD). At that time, they tested my blood cell DNA and said I didn't have the deletion in my dystrophin genes that causes DMD. My son, Danny,...

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