The introduction of exogenous DNA into a cell. Typically, this term refers to the introduction of a gene into an embryo or other eukaryotic cell. In general, this DNA will insert into the genome at random, although specific loci can be targeted. The size of the DNA molecule introduce can be small (a few basepairs) to quite large (over 100 Kb). Read more about transgenesis reference: Selbert S, Rannie D. Analysis of transgenic mice. Methods Mol Biol 2002;180:305-41.
all operations for obtaining an organism that has incorporated, in a stable manner, one or several genes from another cell or organism and is able to transmit these to its offspring