In interphase and early prophase chromatin takes two forms of them heterochromatin that is tightly coiled and condensed as well as take stain more darly or less darkly than euchromatin or non-condensed counterparts.
Heterochromatins are not wholly inert genetically is now known to include some important genetically active regions which are nucleoar organizers and genes for some of the RNA molecules as well as highly repeated nucleotide swquences referred to as repetitive or satellite DNA.
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Tags: euchromatin, heterochromatin
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