Verb
To unwind or open, as a coil of rope.
Source: Webster's dictionaryNo matter what she did with her hair it took about three minutes for it to tangle itself up again, like a garden hosepipe in a shed [Which, no matter how carefully coiled, will always uncoil overnight and tie the lawnmower to the bicycles]. Terry Pratchett
The chromosomes themselves uncoil a bit, allowing some transcription of DNA. Source: Internet
The chromosomes uncoil back into chromatin. Source: Internet