Homologs produced by speciation. Orthologs are g enes derived from a common ancestor that diverged due to divergence of the organisms they are associated with. They tend to have similar function.
                                                            
                                                     
                        
                                                
                        
                        
                            Genes that code for proteins with a similar function, but exists in different species
                                                            
                                                     
                        
                                                
                        
                        
                            Sequences from different species that perform the same biological function and are likely to be evolved from a common ancenstral sequence. See Paralogs.