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Definition of Linkage group
1. Noun. Any pair of genes that tend to be transmitted together. "The genes of Drosophila fall into four linkage groups"
Medical Definition of Linkage group
1. A set of two or more loci that have been shown by linkage analysis to be physically close in the genome but that have not yet been assigned to specific chromosomes. It is rapidly becoming an outmoded term. (05 Mar 2000)