[Taxacom] FW: Morphology vs Molecular
Jason Mate
jfmate at hotmail.com
Wed Aug 19 16:16:40 CDT 2009
> Not sure I understand this. If I am correct, humans and orangutans are
> sister taxa and share a most recent common ancestor. It is not a case of
> reactivation, but retention of features shared by a unique common
> ancestor.
Either they are plesiomorphic character states or the character states have been the result of common evolutionary pressures reactivating certain genes or pathways.
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