Euchromatin is a form of chromatin that is less tightly packed than its counterpart, heterochromatin. This loose structure allows for easier access to the DNA, making it more active in terms of gene expression. Euchromatin is typically found in regions of the genome where genes are actively being transcribed into RNA. In contrast to heterochromatin, euchromatin appears lighter under a microscope and is often associated with genes that are frequently expressed. It plays a crucial role in cellular functions, as it enables the necessary proteins to be produced for various biological processes, including growth and development.