| homologous |
Descended from a common ancestor. Defined in 1843 by Richard Owen, the British Palaeontologist as the "same organ under every variety of form and function". For molecular sequence data, it is taken to mean that two sequences or even two characters within sequences are descended from a common ancestor. This term is frequently mis-used as a synonym for 'similar', as in "two sequences were 70% homologous". This is totally incorrect! Sequences show a certain amount of similarity. ...
출처: www.nuim.ie/academic/biology/james/GlossaryH.html
|
|---|---|
| homology |
Scientists use physical structures to reconstruct evolutionary history. They can do this because similarity between structures is due to common ancestry. This similarity is called "homology." The arm of a primate and the wing of a bat are examples of homologous structures. The bones have been modified from a common ancestor to perform different functions, but can still be recognized as a humerus, a radius or an ulna.
출처: scorescience.humboldt.k12.ca.us/fast/teachers/Crit...
|