2009-07-18, 10:27 AM
The problem with triple helix DNA is that it doesn't fit any of the current models. Also, having one more strand wouldn't essentially make organisms better, just more complicated. I don't think we would really gain anything, seeing as regular DNA is double stranded with each strand being the exact opposite of the other. Adding another opposite would make it identical to the first strand, however, it could be helpful for genetic mutations, as two strands would have to be damaged, not just one.