- Phylogeny is the evolutionary history of a group of species.
- Homologs are the most closely related genes, second step in comparing genomes.
Orthologs are homologs that have their genes at the same genetic locus in different species inherited from a common ancestor.
Paralogs are homologous genes that are at different genetic loci in the same organism.
An out group is out group used in a taxa that is outside the entire group of mammals used in phylogenetic inferences.