Felsenstein's tree-pruning algorithm: Difference between revisions

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m Adding pictures of phylogenetic trees to illustrate my points.
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== Details ==
[[File:Tree_exemple.png|thumb|A simple phylogenetic tree exemple made from arbitrary data D]]
The '''likelihood''' of a tree <math>T</math> is, by definition, the probability of observing certain data <math>D</math> (<math>D</math> being a nucleotide sequence alignementalignment for example ''i.e.'' a succesionsuccession of <math> n </math> DNA site <math> s </math>) given the tree. It is often written : <math>P(D|T)</math>.
 
Here is an example of an evolutionary tree on arbitrary sequence data <math>D</math>: