Term IRI	Term label	Parent term IRI	Parent term label	Alternative term	Definition
http://purl.obolibrary.org/obo/HOM_0000001	homology	http://purl.obolibrary.org/obo/HOM_0000000	similarity		Similarity that results from common evolutionary origin.
http://purl.obolibrary.org/obo/HOM_0000002	homoplasy	http://purl.obolibrary.org/obo/HOM_0000000	similarity		Similarity that results from independent evolution.
http://purl.obolibrary.org/obo/HOM_0000003	homocracy	http://purl.obolibrary.org/obo/HOM_0000000	similarity		Similarity that is characterized by the organization of anatomical structures through the expression of homologous or identical patterning genes.
http://purl.obolibrary.org/obo/HOM_0000004	convergence	http://purl.obolibrary.org/obo/HOM_0000002	homoplasy		Homoplasy that involves different underlying mechanisms or structures.
http://purl.obolibrary.org/obo/HOM_0000005	parallelism	http://purl.obolibrary.org/obo/HOM_0000002	homoplasy		Homoplasy that involves homologous underlying mechanisms or structures.
http://purl.obolibrary.org/obo/HOM_0000006	structural homology	http://purl.obolibrary.org/obo/HOM_0000001	homology		Homology that is defined by similarity with regard to selected structural parameters.
http://purl.obolibrary.org/obo/HOM_0000007	historical homology	http://purl.obolibrary.org/obo/HOM_0000001	homology		Homology that is defined by common descent.
http://purl.obolibrary.org/obo/HOM_0000008	biological homology	http://purl.obolibrary.org/obo/HOM_0000001	homology		Homology that is defined by sharing of a set of developmental constraints, caused by locally acting self-regulatory mechanisms of differentiation, between individualized parts of the phenotype.
http://purl.obolibrary.org/obo/HOM_0000009	reversal	http://purl.obolibrary.org/obo/HOM_0000002	homoplasy		Homoplasy that involves phenotypes similar to those seen in ancestors within the lineage.
http://purl.obolibrary.org/obo/HOM_0000010	syntenic homology	http://purl.obolibrary.org/obo/HOM_0000006	structural homology		Structural homology that is detected by similarity in content and organization between chromosomes.
http://purl.obolibrary.org/obo/HOM_0000011	paralogy	http://purl.obolibrary.org/obo/HOM_0000007	historical homology		Historical homology that involves genes that diverged after a duplication event.
http://purl.obolibrary.org/obo/HOM_0000012	syntenic paralogy	http://purl.obolibrary.org/obo/HOM_0000011	paralogy		Paralogy that involves sets of syntenic blocks.
http://purl.obolibrary.org/obo/HOM_0000013	syntenic orthology	http://purl.obolibrary.org/obo/HOM_0000010	syntenic homology		Syntenic homology that involves chromosomes of different species.
http://purl.obolibrary.org/obo/HOM_0000014	partial homology	http://purl.obolibrary.org/obo/HOM_0000006	structural homology		Structural homology that involves complex structures from which only a fraction of the elements that can be isolated are separately homologous.
http://purl.obolibrary.org/obo/HOM_0000015	protein structural homology	http://purl.obolibrary.org/obo/HOM_0000006	structural homology		Structural homology that is detected at the level of the 3D protein structure, but maybe not at the level of the amino acid sequence.
http://purl.obolibrary.org/obo/HOM_0000016	non functional homology	http://purl.obolibrary.org/obo/HOM_0000006	structural homology		Structural homology that involves a pseudogenic feature and its functional ancestor.
http://purl.obolibrary.org/obo/HOM_0000017	orthology	http://purl.obolibrary.org/obo/HOM_0000007	historical homology		Historical homology that involves genes that diverged after a speciation event.
http://purl.obolibrary.org/obo/HOM_0000018	xenology	http://purl.obolibrary.org/obo/HOM_0000007	historical homology		Historical homology that is characterized by an interspecies (horizontal) transfer since the common ancestor.
http://purl.obolibrary.org/obo/HOM_0000019	1 to 1 homology	http://purl.obolibrary.org/obo/HOM_0000007	historical homology		Historical homology that involves two members sharing no other homologs in the lineages considered.
http://purl.obolibrary.org/obo/HOM_0000020	1 to 1 orthology	http://purl.obolibrary.org/obo/HOM_0000019	1 to 1 homology		Orthology that involves two genes that did not experience any duplication after the speciation event that created them.
http://purl.obolibrary.org/obo/HOM_0000022	ohnology	http://purl.obolibrary.org/obo/HOM_0000011	paralogy		Paralogy that results from a whole genome duplication event.
http://purl.obolibrary.org/obo/HOM_0000023	in-paralogy	http://purl.obolibrary.org/obo/HOM_0000011	paralogy		Paralogy that results from a lineage-specific duplication subsequent to a given speciation event.
http://purl.obolibrary.org/obo/HOM_0000024	out-paralogy	http://purl.obolibrary.org/obo/HOM_0000011	paralogy		Paralogy that results from a duplication preceding a given speciation event.
http://purl.obolibrary.org/obo/HOM_0000025	pro-orthology	http://purl.obolibrary.org/obo/HOM_0000034	1 to many orthology		1:many orthology that involves a gene in species A and one of its ortholog in species B, when duplications more recent than the species split have occurred in species B but not in species A.
http://purl.obolibrary.org/obo/HOM_0000026	semi-orthology	http://purl.obolibrary.org/obo/HOM_0000034	1 to many orthology		1:many orthology that involves a gene in species A and its ortholog in species B, when duplications more recent than the species split have occurred in species A but not in species B.
http://purl.obolibrary.org/obo/HOM_0000027	serial homology	http://purl.obolibrary.org/obo/HOM_0000066	iterative homology		Iterative homology that involves structures arranged along the main body axis.
http://purl.obolibrary.org/obo/HOM_0000028	heterochronous homology	http://purl.obolibrary.org/obo/HOM_0000008	biological homology		Biological homology that is characterized by changes, over evolutionary time, in the rate or timing of developmental events of homologous structures.
http://purl.obolibrary.org/obo/HOM_0000029	paedomorphorsis	http://purl.obolibrary.org/obo/HOM_0000028	heterochronous homology		Heterochronous homology that is produced by a retention in adults of a species of traits previously seen only in juveniles.
http://purl.obolibrary.org/obo/HOM_0000030	peramorphosis	http://purl.obolibrary.org/obo/HOM_0000028	heterochronous homology		Heterochronous homology that is produced by a maturation of individuals of a species past adulthood, which take on hitherto unseen traits.
http://purl.obolibrary.org/obo/HOM_0000031	progenesis	http://purl.obolibrary.org/obo/HOM_0000029	paedomorphorsis		Paedomorphosis that is produced by precocious sexual maturation of an organism still in a morphologically juvenile stage.
http://purl.obolibrary.org/obo/HOM_0000032	neoteny	http://purl.obolibrary.org/obo/HOM_0000029	paedomorphorsis		Paedomorphosis that is produced by a retardation of somatic development.
http://purl.obolibrary.org/obo/HOM_0000033	mimicry	http://purl.obolibrary.org/obo/HOM_0000004	convergence		Convergence that results from co-evolution usually involving an evolutionary arms race.
http://purl.obolibrary.org/obo/HOM_0000034	1 to many orthology	http://purl.obolibrary.org/obo/HOM_0000037	1 to many homology		Orthology that involves two genes when duplications more recent than the species split have occurred in one species but not the other.
http://purl.obolibrary.org/obo/HOM_0000036	many to many homology	http://purl.obolibrary.org/obo/HOM_0000007	historical homology		Historical homology that involves two members of a larger set of homologs.
http://purl.obolibrary.org/obo/HOM_0000037	1 to many homology	http://purl.obolibrary.org/obo/HOM_0000007	historical homology		Historical homology that involves a structure that has no other homologs in the species in which it is defined, and several homologous structures in another species.
http://purl.obolibrary.org/obo/HOM_0000042	apomorphy	http://purl.obolibrary.org/obo/HOM_0000007	historical homology		Historical homology that is based on recent shared ancestry, characterizing a monophyletic group.
http://purl.obolibrary.org/obo/HOM_0000043	plesiomorphy	http://purl.obolibrary.org/obo/HOM_0000007	historical homology		Historical homology that is based on distant shared ancestry.
http://purl.obolibrary.org/obo/HOM_0000044	deep homology	http://purl.obolibrary.org/obo/HOM_0000005	parallelism		Homocracy that involves morphologically and phylogenetically disparate structures that are the result of parallel evolution.
http://purl.obolibrary.org/obo/HOM_0000045	hemiplasy	http://purl.obolibrary.org/obo/HOM_0000007	historical homology		Historical homology that is characterized by topological discordance between a gene tree and a species tree attributable to the phylogenetic sorting of genetic polymorphisms across successive nodes in a species tree.
http://purl.obolibrary.org/obo/HOM_0000046	gametology	http://purl.obolibrary.org/obo/HOM_0000047	chromosomal homology		Historical homology that involves not recombining and subsequently differentiated sex chromosomes.
http://purl.obolibrary.org/obo/HOM_0000047	chromosomal homology	http://purl.obolibrary.org/obo/HOM_0000007	historical homology		Historical homology that involves the chromosomes able to pair (synapse) during meiosis.
http://purl.obolibrary.org/obo/HOM_0000048	many to many orthology	http://purl.obolibrary.org/obo/HOM_0000036	many to many homology		Orthology that involves two genes that experienced duplications more recent than the species split that created them.
http://purl.obolibrary.org/obo/HOM_0000049	within-species paralogy	http://purl.obolibrary.org/obo/HOM_0000011	paralogy		Paralogy that involves genes from the same species.
http://purl.obolibrary.org/obo/HOM_0000050	between-species paralogy	http://purl.obolibrary.org/obo/HOM_0000011	paralogy		Paralogy that involves genes from different species.
http://purl.obolibrary.org/obo/HOM_0000051	postdisplacement	http://purl.obolibrary.org/obo/HOM_0000029	paedomorphorsis		Paedomorphosis that is produced by delayed growth of immature structures into the adult form.
http://purl.obolibrary.org/obo/HOM_0000052	hypermorphosis	http://purl.obolibrary.org/obo/HOM_0000030	peramorphosis		Peramorphosis that is produced by a delay in the offset of development.
http://purl.obolibrary.org/obo/HOM_0000053	synology	http://purl.obolibrary.org/obo/HOM_0000018	xenology		Xenology that results, not from the transfer of a gene between two species, but from a hybridization of two species.
http://purl.obolibrary.org/obo/HOM_0000054	isoorthology	http://purl.obolibrary.org/obo/HOM_0000062	equivalogy		Orthology that involves functional equivalent genes with retention of the ancestral function.
http://purl.obolibrary.org/obo/HOM_0000055	tandem paralogy	http://purl.obolibrary.org/obo/HOM_0000011	paralogy		Paralogy that is characterized by duplication of adjacent sequences on a chromosome segment.
http://purl.obolibrary.org/obo/HOM_0000057	latent homology	http://purl.obolibrary.org/obo/HOM_0000058	syngeny		Parallelism that involves morphologically very similar structures, occurring only within some members of a taxon and absent in the common ancestor (which possessed the developmental basis to develop this character).
http://purl.obolibrary.org/obo/HOM_0000058	syngeny	http://purl.obolibrary.org/obo/HOM_0000003	homocracy		Homocracy that involves recognizably corresponding characters that occurs in two or more taxa, or as a repeated unit within an individual.
http://purl.obolibrary.org/obo/HOM_0000060	apparent orthology	http://purl.obolibrary.org/obo/HOM_0000050	between-species paralogy		Between-species paralogy that involves single copy paralogs resulting from reciprocal gene loss.
http://purl.obolibrary.org/obo/HOM_0000061	pseudoparalogy	http://purl.obolibrary.org/obo/HOM_0000018	xenology		Xenology that involves genes that ended up in a given genome as a result of a combination of vertical inheritance and horizontal gene transfer.
http://purl.obolibrary.org/obo/HOM_0000062	equivalogy	http://purl.obolibrary.org/obo/HOM_0000065	functional equivalence		Historical homology that involves functional equivalent genes with retention of the ancestral function.
http://purl.obolibrary.org/obo/HOM_0000063	interology	http://purl.obolibrary.org/obo/HOM_0000007	historical homology		Historical homology that involves orthologous pairs of interacting molecules in different organisms.
http://purl.obolibrary.org/obo/HOM_0000065	functional equivalence	http://purl.obolibrary.org/obo/HOM_0000000	similarity		Similarity that is characterized by interchangeability in function.
http://purl.obolibrary.org/obo/HOM_0000066	iterative homology	http://purl.obolibrary.org/obo/HOM_0000008	biological homology		Biological homology that involves parts of the same organism.
http://purl.obolibrary.org/obo/HOM_0000068	paraxenology	http://purl.obolibrary.org/obo/HOM_0000018	xenology		Xenology that is characterized by multiple horizontal transfer events, resulting in the presence of two or more copies of the foreign gene in the host genome.
http://purl.obolibrary.org/obo/HOM_0000069	plerology	http://purl.obolibrary.org/obo/HOM_0000011	paralogy		Paralogy that is characterized by extra similarity between paralogous sequences resulting from concerted evolution.
http://purl.obolibrary.org/obo/HOM_0000071	homotopy	http://purl.obolibrary.org/obo/HOM_0000006	structural homology		Structural homology that involves structures with the same or similar relative positions.
http://purl.obolibrary.org/obo/HOM_0000072	homeosis	http://purl.obolibrary.org/obo/HOM_0000008	biological homology		Biological homology that involves an ectopic structure and the normally positioned structure.
http://purl.obolibrary.org/obo/HOM_0000073	homoeology	http://purl.obolibrary.org/obo/HOM_0000053	synology		Synology that results from allopolyploidy.
http://purl.obolibrary.org/obo/HOM_0000074	paramorphism	http://purl.obolibrary.org/obo/HOM_0000066	iterative homology		Iterative homology that involves two structures, one of which originated as a duplicate of the other and co-opted the expression of patterning genes of the ancestral structure.
http://purl.obolibrary.org/obo/HOM_0000075	regulogy	http://purl.obolibrary.org/obo/HOM_0000007	historical homology		Historical homology that involves orthologous pairs of transcription factors and downstream regulated genes in different organisms.
http://purl.obolibrary.org/obo/HOM_0000000	similarity				Relation between biological objects that resemble or are related to each other sufficiently to warrant a comparison.
http://purl.obolibrary.org/obo/HOM_0000021	allogeny				Relationship between recognizably corresponding characters that occurs in two or more taxa and have different generative bases.