Talk about the first level of condensation.

Chromatin fibers or nucleofilaments consisting of filaments of 11nm diameter having a "beads on a string" morphology. It results in the winding of long DNA around a core of a nucleosome, which consists of an octamer of histones 2 subunits of each kind. DNA helix makes 2 turns around the histone. distance separating two nucleosomes is called DNA linker and is variable in length.