I understand how to construct a tree, but I do not understand how we know if the tree we construct is wrong, like the example in the "icp" website. How do we know when the tree is wrong by looking at the numbers in the table?
Great question. The answer is that you don't know, and you have no way on knowing, unless you watched the evolution occur (as with experimental evolution or computer simulation) or you made the tree up (as in the icp website example). The point is that sometimes some methods of phylogeny reconstruction don't give you the right tree. That's why researchers often use several different methods to build a phylogeny, and are continuously working to find methods that give the "wrong" tree less often.
Welcome to the blog for Applied Evolution at UH, fall 2008. I will use this site to post course information, announcements, lecture notes, etc. Please check this site often. If you have questions or comments, please reply to the relevant post.
2 comments:
I understand how to construct a tree, but I do not understand how we know if the tree we construct is wrong, like the example in the "icp" website. How do we know when the tree is wrong by looking at the numbers in the table?
Great question. The answer is that you don't know, and you have no way on knowing, unless you watched the evolution occur (as with experimental evolution or computer simulation) or you made the tree up (as in the icp website example). The point is that sometimes some methods of phylogeny reconstruction don't give you the right tree. That's why researchers often use several different methods to build a phylogeny, and are continuously working to find methods that give the "wrong" tree less often.
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