Chromatin is a complex of DNA and proteins found in the nucleus of eukaryotic cells. It plays a crucial role in packaging DNA into a compact, organized structure, allowing it to fit within the cell nucleus. Chromatin exists in two forms: euchromatin, which is loosely packed and accessible for gene expression, and heterochromatin, which is tightly packed and generally inactive. The structure of chromatin is essential for regulating gene activity and maintaining DNA integrity. During cell division, chromatin condenses to form chromosomes, ensuring that genetic information is accurately distributed to daughter cells. This organization is vital for proper cellular function and development.