Deborah Harrell wrote: > > A chromosomal mutation like Down's (trisomy 21), > It's not a mutation. Trisomy means that the 21 chromosome gets a third _copy_. Mutation means that a gene is alterered.
>on the other hand, doesn't appear amenable (to me) to >gene therapy, > Yes, it is very difficult to "neutralize" the ill effects of an extra chromosome in _all_ cells of the body. > although it is discoverable if chorionic > villi sampling or amniocentesis are done; > There are other, non-invasive, techniques of detection, like the triple test (that checks for three things in the mother's blood) and ultrasound studies Alberto Monteiro _______________________________________________ http://www.mccmedia.com/mailman/listinfo/brin-l
