Heredity Heredity

Series Title(s): Biological sciences series Contributor(s): Strandskov, H. H. Encyclopaedia Britannica Films, Inc. Publication: [Chicago, IL] : Encyclopaedia Britannica Films, c1939 Language(s): English Format: Moving image Subject(s): Genetics Genre(s): Animation Instructional Film and Video Abstract: The mode of transmission of hereditary materials which are responsible for the inherited characteristics of all plants and animals is presented. Live action and animation are used to demonstrate what happens when the egg and sperm of red-coated and white-coated cattle meet to form the zygote and when mitosis occurs. Over animation superimposed on live shots of the resulting roan calf, the narrator explains how both sets of genes influence the color of this animal. The effects of mating two roan animals are then similarly explained. In this case 1/4 of the calves will be red, 1/2 of them roan, and 1/4 of them white. Guinea pig crosses produce slightly different results. Over shots of black and white guinea pigs, animation and animation superimposed on live shots, black dominance in these animals is explained. Rough-coated dominance in guinea pigs is similarly explained, as is black or white combined with rough or smooth dominance. Copyright: This item may be under copyright protection. Please ask copyright owner for permission before publishing. Copyright Information: Encyclopedia Britannica Films; Source: Item; Research date: 11/03/2011 Extent: 011 min. Color: Black and white Provenance: Received: Dec. 22, 1989 as a donation from Mapleton Public School. Technique: Animation and live action NLM Unique ID: 9200594A (See catalog record) OCLC no.: 6372649 Permanent Link: http://resource.nlm.nih.gov/9200594A