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Re: organic conversations
Owen (1834) defined homology as "the same organ under every variety of
form and function". [...] Thus, any definition of homology that has an
evolutionary component (including 'shared ancestry', which is its current
usage) is a re-invention from Owen's original concept.
That strikes me as exaggerated. It's just an explanation of what on the
planet "the same organ" _means_. :-)
Molecular biologists recognize that certain genes or proteins have a
common ancestry, just as organismal biologists recognize that certain
organs or appendages have a common ancestry.
Yes. They just shouldn't say "% homologous" when they mean "% identical".