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Homology and Similarity

Homology and Similarity


A widely accepted broad definition of homology within biological sciences is:

Things are homologs if they share a common ancestry.

Homology is a hierarchical concept, and therefore, at each level, the "things" refers to different items.

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References

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IUPAC-IUB Joint Commission on Biochemical Nomenclature. Nomenclature and Symbolism for Amino Acids and Peptides: Recommendations 1983. FEBS J. 1984, 138 (1), 9–37. DOI: 10.1111/j.1432-1033.1984.tb07877.x. HTML version.

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Günter P. Wagner. (2014) Homology, Genes, and Evolutionary Innovation. Princeton University Press.

Wagner, G. P. (2015). Homology and the evolutionary process: reply to Haig, Love and Brown on “Homology, Genes and Evolutionary Innovation.” Biol. & Phil. doi: 10.1007/s10539-015-9492-0

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R. Owen, On the Archetype and Homologies of the Vertebrate Skeleton, J. van Voorst, London (1847). biodiversitylibrary.org

W.M. Fitch, Homology: a personal view on some of the problems, Trends Genet. 16 (2001) 227e231. doi: 10.1016/S0168-9525(00)02005-9