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Questions and Answers
What type of tree is obtained from phenetic methods?
What type of tree is obtained from phenetic methods?
- Phylogram
- Evolutionary tree
- Dendrogram (correct)
- Cladogram
What is the main difference between phenetic and cladistic methods?
What is the main difference between phenetic and cladistic methods?
- The alignment method used
- The number of sequences analyzed
- The input sequences used
- The type of tree produced (correct)
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?
- Sequence similarities
- Sequence differences
- Each alignment position (correct)
- Sequence lengths
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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