A genetically engineered microorganism. A locus on a chromosome that encodes a specific protein or several related proteins. It is considered the functional unit of heredity. The presence of multiple genes.
Amplification is one mechanism through which proto-oncogenes are activated in malignant cells.
The process of synthesizing multiple copies of a particular DNA sequence using a bacteria cell or another organism as a host. See DNA , Host . The percentage of a given allele in a population of organisms. See Allele . The addition of one or more copies of a normal gene into a defective chromosome.