Definition: Heterochromatin is a type of chromatin structure that is found in the euchromatin region, but not in the non-homologous chromosomes. It refers to regions of chromatin where DNA is present in two or more different forms (e.g., euchromatin and heterochromatin). This difference in DNA expression can occur due to genetic differences between homologous chromosomes. In simple terms, it's like having two sets of chromosomes: one set that carries the same
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