About DNA Compaction
I came across this article while reading comments to a blog entry at Uncommon Descent. There are some nice visuals to go along with brief descriptions of important biological entities. The linked article begins with this observation:
The structure of the DNA within the cell, as explained by most textbooks, is a caricature of its actual compaction and structure. In a eukaryotic cell, the DNA undergoes many levels of twisting, folding, rolling, twirling, and coiling during replication, or meiosis. Most genetics textbooks present a summary, since many of these structural discoveries are on-going. Given the dense and complex compaction DNA undergoes, only providing a summary in a textbook is understandable, but does not due the process justice.