5 Questions
What type of tree is obtained from phenetic methods?
Dendrogram
What is the main difference between phenetic and cladistic methods?
The type of tree produced
In cladistic methods, what is used as evolutionary information to build a tree?
Each alignment position
What is the purpose of distance methods in phenetic tree calculation?
To compress individual differences into a single number
What is the key feature of cladistic trees?
They are calculated using parsimony or likelihood methods
Study Notes
Phenetic Methods
- Calculate trees based on similarities of sequences using distance methods
- Resulting tree is called a dendrogram
- Dendrogram does not necessarily reflect evolutionary relationships
- Compress individual differences between pairs of sequences into a single number
Cladistic Methods
- Calculate trees considering various possible evolution pathways
- Pathways based on parsimony or likelihood methods
- Resulting tree is called a cladogram
- Use each alignment position as evolutionary information to build a tree
Compare and contrast phenetic and cladistic methods in constructing phylogenetic trees. Learn how distance methods and parsimony methods are used to infer evolutionary relationships.
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