Genetic Investigations

Duration: 12 min.

Genre: Educational

Year Published: 1961

Creator: iu

Format: 16mm

Color: Color

Sound: sound

Description: Presents some of the steps and procedures involved in conducting controlled-breeding experiments. Shows the results of some genetic crosses. Introduces important areas of genetic research, Presents some of the steps and procedures involved in conducting controlled breeding experiments and shows the results of some genetic crosses. Introduces three important areas of genetic research. Illustrates bombardment of fruit flies with X-ray and shows some of the obvious mutations produced in these fruit flies. Pictures a schematic model of the DNA molecule and presents questions concerning its structure, organization, and duplication. Uses animation to picture basic discoveries of inheritance.

Complete Record: , Points out how the differences in characteristics in animals and plants have always interested man and have led to Mendel's experiments with peas and today's experiments with Drosophila. Uses animation to picture Mendel and his basic discoveries of inheritance. Stresses advantages of Drosophila in studying genetics and uses macrocinematography to illustrate mutations which may be produced with X-rays. Shows Dr. H. J. Muller at work in his laboratory at Indiana University X-raying fruit flies. Dr. Sonneborn experimentally reveals the role the cytoplasm plays in inheritance by mixing different strains of paramecia. Views model of DNA and points out that how it is joined and reproduces itself is a problem for future experimenters to uncover., NOTE: Two (or more) records have been merged together to create this data.