DNA electrophoresis pattern viewer is an experimental device used in biology teaching, which can help students observe and analyze the results of DNA electrophoresis. The device usually includes an ultraviolet transmission instrument and an image capture system, which can display the migration of DNA fragments in gel. In biology teaching, students can use observers to learn how the size, shape, and concentration of DNA molecules affect their migration rate in an electric field. By analyzing electrophoresis patterns, students can master the basic skills of gene isolation, cloning, and identification, and understand the transmission and expression of genetic information. In addition, this device can also be used for teaching demonstrations to help students understand basic concepts in molecular biology.