Key points for Chapter 7 1. Definitions: nucleosome, gene density, core histones(structure and function), Nucleosome remodeling complexes 2, Describe the important functions of packing of dNA into chromosome 3. Why genes make up only a small proportion of the eukaryotic genome.Key points for Chapter 7 1.Definitions: nucleosome, gene density, core histones (structure and function), Nucleosome remodeling complexes 2.Describe the important functions of packing of DNA into chromosome. 3.Why genes make up only a small proportion of the eukaryotic genome