Ratios of non-protein-coding DNA and megabases of protein-coding regions per haploid genome across species. (a) Ratios of bases in non-protein-coding regions vs. total genomic DNA per sequenced genome. Prokaryotes are in black, unicellular eukaryotes in gray, organisms known to be both uni- and multicellular, depending on lifecycle, in light blue, basal multicellular organisms in blue, plants in green, nematodes in purple, arthropods in orange, chordates in yellow, vertebrates in red. (b) Amount (in megabases) of protein-coding regions per genome for species ranked by fraction of non-protein-coding DNA in (a). Adapted from Taft et al. [33], with permission.