Generic name, drug: The term “generic name” has several meanings as regards drugs:
The chemical name of a drug.
A term referring to the chemical makeup of a drug rather than to the advertised brand name under which the drug is sold.
A term referring to any drug marketed under its chemical name without advertising.
“Diazepam” is an example of the chemical (generic) name of a sedative. It is marketed by some companies under its generic name and by other companies under brand names such as Valium or Vazepam.
Generic drugs marketed without brand names are less expensive than brand-name drugs even though they are chemically identical to brand-name drugs and meet U.S. Food and Drug Administration (FDA) standards for safety, purity and effectiveness.
Genes: The basic biological units of heredity. Segments of deoxyribonucleic acid (DNA) needed to contribute to a function. An official definition: According to the official Guidelines for Human Gene Nomenclature, a gene is defined as “a DNA segment that contributes to phenotype/function. In the absence of demonstrated function a gene may be characterized by sequence, […]
- Genes, breast cancer susceptibility
Genes, breast cancer susceptibility: See: Breast cancer susceptibility genes.
genesis: A suffix referring to the beginning, development, or production of something. For example, gametogenesis is the development and production of the male and female germ cells (the gametes) required to form a new individual. Osteogenesis is the production of bone. Pathogenesis is the development of a disease, the sequence of events leading up to […]
- Genetic anticipation
Genetic anticipation: A remarkable phenomenon in which a genetic disease appears earlier appearance and with increased from with each succeeding generation. Anticipation was once thought not to exist in genetics. It was chalked off as a meaningless statistical artifact. However, anticipation has now been proven to occur in a large number of important genetic disorders, […]
- Genetic code
Genetic code: The instructions in a gene that tell the cell how to make a specific protein. A, T, G, and C are the ‘letters’ of the DNA code and represent the chemicals adenine, thymine, guanine, and cytosine, respectively. These make up the nucleotide bases of DNA. Each gene’s code combines these four chemicals in […]