The double helix strand of DNA coils around proteins called histones. These coils coil themselves into supercoils around other proteins. The supercoils are chromosomes, which only form during mitosis.
The DNA is divided into different linear bundles called chromosomes that are separated by spindle during the nuclear division of the DNA. They condensed into highly structured coil. The coil tightens until the DNA creates a proper segregation during the mitosis stage and cell division.
