Here's a 1971 clip focused on geneticists working in a lab. One worker along with the narrator discuss the possibilities and implications of human genetic engineering. 

Geneticist David Suzuki (with a beard and long hair) looking into a microscope, then directly at the camera, talking about fruit flies. CUs of Suzuki working. 

A medium shot of Suzuki tapping a machine with a label reading "Suzuki." 

CU of numbers (82-86) flipping by on an analog counter. 

Medium shot of a white female scientist using a microscope, and handling bottles. 

Medium shot, then a wide shot of fruit flies in a bottle. CU of a pointing tapping numbers on a sheet of paper. Pull back from above of test tubes stuffed with cotton. CU of scientist handling test tubes.