Explain the relation between chromatin and chromosome, Biology

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What is the relation between the concepts of chromatin and chromosome? Are euchromatin and heterochromatin part of chromosomes?

Every filament of chromatin is a complete DNA molecule (a complete double helix), i.e., a complete chromosome. A DNA molecule might be form euchromatin and heterochromatin portions therefore both are part of chromosomes.

Cell Nucleus Review - Image Diversity: chromosome structure

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