Which of the following phenomena leads to variation in DNA ?

Explanation

Eukaryotic cells posses a set of positively charged, basic proteins called histone rich in Jasic amino acid, residues lysines and arginine. Histones are organized to form a unit of eight molecules, called Histone Octamer. The negatively charged DNAis wrapped around the positively charged Histone Octamer to form a structure called Nucleosome. Atypical nucleosome centains 200 bp of DNA helix and nucleosome forms the repeating unit of a structure of the nucleus called Chromatin.