Final answer:
Ethidium bromide (EtBr) and SYBR green are two dyes used to monitor nucleic acid migration during gel electrophoresis, both of which fluoresce under UV light to visualize DNA or RNA fragments.
Step-by-step explanation:
Two dyes that are commonly used to monitor the migration of nucleic acids during gel electrophoresis are ethidium bromide (EtBr) and SYBR green. Ethidium bromide is a fluorescent dye that intercalates with DNA bases, allowing visualization of nucleic acids when exposed to UV light. SYBR green also works similarly by binding to nucleic acids and fluorescing under UV light. These dyes provide a way to monitor the progress of the electrophoretic separation in real-time and help estimate the size of nucleic acid fragments after electrophoresis.