DNA stains are special dyes used in laboratories to visualize and analyze deoxyribonucleic acid (DNA) in various samples. These stains bind specifically to DNA, allowing scientists to see its presence and quantity under a microscope or during gel electrophoresis. Common DNA stains include ethidium bromide and SYBR Green, which emit fluorescence when exposed to ultraviolet light. These stains are essential tools in molecular biology, helping researchers study genetic material in cells, identify genetic disorders, and conduct forensic analysis. By using DNA stains, scientists can better understand the structure and function of DNA, contributing to advancements in genetics and biotechnology.