Earlier quoted context omitted.
> What we know as the double helix, what everybody thinks of as DNA, is really a picture of sex (or "conception" if you want to get technical. That's why we have sex of course). DNA only occurs in that form during reproduction (could be cell, or organism reproduction of course, though during cell (asexual) reproduction it's only present for a few seconds at best, during sexual reproduction it exists for a few minutes…
In the chromatin network there's no double helix, because it's always mostly unrolled and various things are bound to it. It looks a lot more like a ladder. The double helix as analyzed only exists as part of chromosomes.
http://upload.wikimedia.org/wikipedia/commons/d/db/Nucleosom...