Source:http://linkedlifedata.com/resource/umls/id/C1155631
GO: The progressive compaction of dispersed interphase chromatin into threadlike chromosomes prior to mitotic or meiotic nuclear division, or during apoptosis, in eukaryotic cells. [GOC:mah, ISBN:0815316194],NCI: A process of progressive and tight packing of dispersed replicated interphase chromatin into compact structures in metaphase prior to mitotic or meiotic nuclear division or during apoptosis in eukaryotic cells.