Podcast
Questions and Answers
What type of tree is obtained from phenetic methods?
What type of tree is obtained from phenetic methods?
What is the main difference between phenetic and cladistic methods?
What is the main difference between phenetic and cladistic methods?
In cladistic methods, what is used as evolutionary information to build a tree?
In cladistic methods, what is used as evolutionary information to build a tree?
What is the purpose of distance methods in phenetic tree calculation?
What is the purpose of distance methods in phenetic tree calculation?
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What is the key feature of cladistic trees?
What is the key feature of cladistic trees?
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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
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Description
Compare and contrast phenetic and cladistic methods in constructing phylogenetic trees. Learn how distance methods and parsimony methods are used to infer evolutionary relationships.
