>>511312045 (OP)...but we need a pair of chromosome 21 to function? Have they just moved the genes to other chromosomes? Have they managed to do that without messing up the the cis- and trans- elements from chromosome 21 that regulate gene expression and epigenetics?
Have they found the cause for trisomy in the germline cell division process and amended that? Is that what that means?
I don't think so either way.
t. in the extra chromosome business