Ortholog:
Homologous
genes that have diverged from each other after speciation events (e.g., human beta- and chimp
beta-globin)
Paralog:
Homologous
genes that have diverged from each other after gene
duplication
events (e.g., human beta-
and gamma-globin)
Xenolog:
Homologous
genes that have diverged from each other after lateral
gene transfer events (e.g., antibiotic
resistance genes in bacteria)
Homolog:
Genes that are descended from a common
ancestor (e.g., all globins)
