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g. Explain the positive feedback and spreading concept for constitutive heterochromatin? What is the writer of histone modifi

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Heterochromatin is a key feature of eukaryotic chromosomes,which endows domains with specific functional properties.The capacity of heterochromatin to restrain the activity of mobile elements ,isolate DNA repair in repetitive regions and ensure accurate chromosome seggregation is crucial for maintaining genomic stability.

Heterochromatin is of two types-

A)-CONSTITUTIVE HETEROCHROMATIN

B)-FACULTATIVE HETEROCHROMATIN

Constitutive heterochromatin is demonstrated using C-banding and consists of highly repetitive sattelite DNA.The DNA of constitutive heterochromatin is late -replicating,and in mammals ,its cytosines are often methylated.The highly repetitive DNA sequences found in most heterochromatin cannot be translated into proteins.

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