 There are two types of chromatin . <unk> is the less compact DNA form , and contains genes that are frequently expressed by the cell . The other type , heterochromatin , is the more compact form , and contains DNA that is infrequently transcribed . This structure is further categorized into <unk> heterochromatin , consisting of genes that are organized as heterochromatin only in certain cell types or at certain stages of development , and <unk> heterochromatin that consists of chromosome structural components such as <unk> and <unk> . During interphase the chromatin <unk> itself into discrete individual patches , called chromosome territories . Active genes , which are generally found in the <unk> region of the chromosome , tend to be located towards the chromosome 's territory boundary . 
