n. (Genetics) A group of organisms sharing a specific genetic constitution. [ wns=1 ] [ WordNet 1.5 ]
2. (Genetics) The genetic constitution of an organism, specifying the particular alleles at defined loci in the genome; -- used with respect to one gene, a specific group of genes, or the entire set of genes within the organism. Contrasted with phenotype. Syn. -- genetic constitution. [ WordNet 1.5 + PJC ]