Slow-motion time ; Genetics

SEGMENT 1: Slow-Motion Time. Both high-speed and slow-motion photography may be used to show details that are not necessarily seen by the human eye. Film material is presented that shows slowmotion images of a fly, a hummingbird, liquids, and an airplane explosion and demonstrates the diversified uses of this photographic technique. For example, the airline whose plane crashed may be able to determine the cause by viewing slow-motion images of the accident. The films were produced by the Wollensack Optical Company, Henry Lester, Bell Laboratories and Cleveland Aeronautics. SEGMENT 2: Genetics. In this second program in the series on genetics, Harry L. Shapiro, AMNH Department of Anthropology, explains how a knowledge of dominant and recessive hereditary characteristics helps predict the probable make-up of an unborn child. Sweet peas and guinea pigs are used to demonstrate Mendel's laws of genetics (dominant traits). An expecting couple ask questions about hereditary characteristics throughout the segment.