Genetically modified organism, or GMOs, is a term covering plants and animals that have had their genetic traits altered by means other than conventional breeding.
For instance, a scientist may insert a gene from one plant species into another to develop a desired trait, possibly to make it resistant to disease or produce higher yields, that could be difficult or impossible through traditional hybridization.
This process can involve transferring genes between different varieties of the same species or even between animals, microorganisms and plants.
Genetic engineering also allows scientists to prevent the transfer of undesired traits.
Transgenic is another term for GMOs.