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15 Cards in this Set

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Humans possess how many genes?
20,000 to 25,000
A complete set of genetic instructions for any organism
Genome
All genomes are encoded in nucleic acids- either ____ or ____.
DNA or RNA
Encompasses the basic principles of genetics and how traits are passed from one generation to the next
Transmission Genetics
Concerns the chemical nature of the gene itself: how genetic information is encoded, replicated and expressed.
Molecular Genetics
Explores the genetic composition of groups of individual members of the same species and how that composition changes over time and with geographic space.
Population Genetics
Organisms with characteristics that make them particularly useful fo genetic analysis and about which a tremendous amount of information has accumulated
Model Genetic Organisms
Concept in which specific particles, later called gemmules, carry information from various parts of the body to the reproductive organs, where they are passed to the embryo at the moment of conception.
Pangenesis
Notion in which traits acquired during one's lifetime become incorporated into one's hereditary information and are passed on to the offspring.
Inheritance of Acquired Characteristics
Concept that inside an egg there is a miniature adult, or homunucleus, which enlarges during development.
Preformationism
Proposed that offspring are a blend, or mixture, of parental traits.
Blending Inheritance
All life is composed of cells, cells arise only from preexisting cells, and the cell is the fundamental unit of structure and function in living organisms.
Cell Theory
Theory that holds that the cells in the reproductive organs carry a complete set of genetic information that is passed to the egg and sperm.
Germ-Plasm Theory
Who proposed that genes are located on chromosomes?
Walter Sutton
Discovered the first genetic mutant of fruit flies.
Thomas Hunt Morgan