A process that is carried out at the cellular level that results in the assembly, arrangement of constituent parts, or disassembly of chromosomes, structures composed of a very long molecule of DNA and associated proteins that carries hereditary information. This term covers covalent modifications at the molecular level as well as spatial relationships among the major components of a chromosome.

chromosome organisation

GO:0051277, GO:0007001

biological_process

maintenance of genome integrity, nuclear genome maintenance, chromosome organization and biogenesis

GO:0051276

http://purl.obolibrary.org/obo/cl.owl