any of various techniques for separating and recombining segments of DNA or genes, often employing a restriction enzyme to cut a gene from a donor organism and inserting it into a plasmid or viral DNA for transplantation into a host organism, where the gene causes the production of a desired substance either for harvesting or for the benefit of the host organism itself.
Techniques, usually associated with genetic engineering, in which strands of DNA from different sources are spliced together to form DNA for a new life form. Gene splicing is another name for this process.