A newly introduced gene.
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trans·gene 'tran(t)s-.jēn, 'tranz- n a gene that is taken from the genome of one organism and introduced into the genome of another organism by artificial techniques
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trans·gene (transґjēn) a segment of recombinant DNA that has been transferred from one genome to another; the term is sometimes used specifically to denote one that has been integrated into the germline of the recipient and is transmissible to future generations.Medical dictionary. 2011.