When springtime arrives, the green fern fronds uncoil and uncurl and stretches up. They produce coiled fiddleheads that uncoil and expand into fronds. The chromosomes themselves uncoil a bit, allowing some transcription of DNA. This makes the strands unable to uncoil and separate. E.cicutarium with larger seeds have a longer coil and uncoil time compare to smaller seeds. In the regions of puffs, the chromonemata uncoil and open out to form many loops.