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Portrays the role of developmental genetics in dealing with ways phenotypes come into being through the action of genes. Presents a complete discussion of the Creeper domestic fowl--its genetic bas...
Shows the parts of a single ram vertical machine; how to interpret the blueprint of a broaching tool; how to install broaching inserts for straddle broaching; how to mount the toolholder with its a...
Pictures reproductive isolation originating through interspecific hybridization, via amphyploidy (radish-cabbage, new world cottons, goatsbeard species), and by means of introgression (tobacco, ros...
Demonstrates independent segregation by different pairs of genes using Mendel's data. Emphasizes the chromosomal activities during meiosis which are responsible for independent segregation. Descri...
Discusses the effect of various levels of inbreeding (self-fertilization, sib matings, half-sib matings, cousin marriages) upon making heterozygous genes homozygous with the consequent loss of vigo...
Portrays the frequency of mutants in the population gene pool as dependent upon their rate of origination and selection coefficient. Discusses the population fate of dominant lethals (retinoblasto...
Demonstrates through slow motion and natural photography the positions and movements of the "Hoosier Promenade." Opens with a group of eight dancers performing the introduction to the dance. Shows ...
Uses animation, slow motion, and real photography to demonstrate the positions and movements of dancers and dancing couples in the "grapevine twist." Shows each part of the dance separately and the...
Teaches the square dance figure "Take a Little Peek," with synchronous music and action. Presents live and animated demonstrations of the dance at regular speed and in slow motion, and explains the...
Demonstrates through slow motion and natural photography the positions and movements of the "Texas Star." Opens with a group of eight dancers performing the introduction to the dance. Shows each pa...
Demonstrates various methods of preparing materials to be used on different types of still projectors. Explains that instructional materials may be prepared for projection by utilizing their qualit...
**WARNING: CONTAINS GRAPHIC IMAGES OF LAB TEST ANIMALS** Illustrates the basic techniques of obtaining germfree environment, germfree animals, and methods of germfree miantenance. Demonstrates the...
Describes the states of Texas, Louisiana, Mississippi, Alabama, and Florida as comprising the Gulf Coast region of the United States. Picture crops in Florida and explains that these crops are gro...
Division of Visual Aids, U.S. Office of Education (Producer); Federal Security Agency (Producer); Ray-Bell Films, Inc. (Producer)
Summary:
Explains why accessories are used with gage blocks; shows how to inspect a plug gage, an adjustable snap gage, a profile gage, a ring gage, and a screwthread pitch; and shows how to build a height ...
Teaching Film Custodians abridged classroom version of a Cavalcade of America television episode, "The Last Will of Daniel Webster" (season 2, episode 8), which first aired November 14th, 1953 on A...
Comprised of three short films by Walton Films, "The Reign of King George VI," "Elizabeth - Our Queen," and "Trooping the Colour Ceremony," and one film by Peak Film Productions, "London," about En...
Shows the geological influence on local distribution of plants in the non-glaciated area of southwestern Wisconsin. Highlights many soil conditions and the variety of plants in their region. Catego...
Do you like to live in a city? Or would you prefer to move to the suburbs and escape slums, juvenile delinquency traffic jams? Many people are moving to suburbs, and urban areas are growing until, ...
Illustrates abnormalities in gait caused by pain, structural defects and deformities, neuromuscular disorders, and a combination of these causes. Details technical symptoms of the gait and posture ...
Demonstrates the use of high contrast photography for the preparation of 2" x 2" and 3 1/4" x 4" negative and positive slides, transparencies, and overlays for overhead projectors and for printing ...
