Genetics: Improving Plants and Animals

Illustrates four methods which geneticists use to control the heredity of plant and animals--the techniques of inbreeding, hybridizing, development of desired mutations, and increasing the number of chromosomes--and shows their effect on improving size, taste, color, hardiness, and other desired characteristics., Discusses the genetic principles which are employed in order to produce improvements in plant and animal stock. Describes and exemplifies each of the four principal methods that are used to improve inherited charactristics: (1) inbredding, (2) hybridizing, (3) selection of mutants, and (4) increasing the number of chromosomes., . Methods used to control plant and animal heredity are demonstrated in laboratory, greenhouse and experimental-farm scenes., NOTE: Two (or more) records have been merged together to create this data.