congenic

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con·gen·ic

(kon-jen'ik),
Relating to an inbred strain of animals produced by repeated crossing of one gene line onto another inbred (isogenic) line.
[con- + G. genos, birth, + -ic]

congenic

/con·gen·ic/ (kon-jen´ik) of or relating to a strain of animals developed from an inbred (isogenic) strain by repeated matings with animals from another stock that have a foreign gene, the final congenic strain then presumably differing from the original inbred strain by the presence of this gene.
Referring to organisms which differ in only one gene locus, the result of specific inbreeding of animals in experimental settings

congenic

Of organisms that differ only at a single genetic locus.

congenic

a genetic term usually used to refer to specially inbred strains of mice that differ only in restricted regions of the genome; used particularly in mapping major histocompatibility complex antigens.