This is a great worksheet that allows students to watch Bill Nye's Greatest Discoveries in Genetics and easily record major events on a handout. YouTube divides the video into segments beginning with Mendel and ending with the Human Genome Project. Students simply circle the best response. This worksheet can be used as a cut-and-paste timeline or displayed with a projector like a PowerPoint presentation. Discoveries include the location of genes, the double helix, messenger RNA, the genetic code, and DNA fingerprinting. It is suitable for any biology class and is a great introduction to biotechnology.