of similar polygons are the homologues of each other; the members or terms of an homologous series in chemistry are the homologues of each other; one of the bones in the hand of man is the homologue of that in the paddle of a whale
1 >One of a pair of chromosomes that segregate from one another during the first meiotic division 2 A gene related to a second gene by descent from a common ancestral DNA sequence The term, homologue, may apply to the relationship between genes separated by the event of speciation (see orthologue) or to the relationship betwen genes separated by the event of genetic duplication (see paralog) 3 A morphological structure in one species related to that in a second species by descent from a common ancestral structure
Homologues proteins have evolved from a common ancestor, and their evolutionary relationship is evident from similarities in sequence, structure and/or function