You Are Reconstructing a Phylogeny (Evolutionary Tree)of Three Strains of the Same

question 4

Multiple Choice

You are reconstructing a phylogeny (evolutionary tree) of three strains of the same bacteria species.Analysis of different genes results in different phylogenies.Phylogeny A analyzed the bacterial strains using the smil gene,while phylogeny B analyzed the nosy gene.The true evolution of these strains is illustrated below the phylogenies.Study these diagrams and determine what is the best representation of these bacterial strains and why.

• A)Phylogeny A,because the nosy gene was acquired via horizontal gene transfer and not an ancestor-descent relationship.
• B)Phylogeny A,because the smil gene was acquired via horizontal gene transfer and not an ancestor-descent relationship.
• C)Phylogeny B,because the nosy gene was acquired via horizontal gene transfer and not an ancestor-descent relationship.
• D)Phylogeny B,because the smil gene was acquired via horizontal gene transfer and not an ancestor-descent relationship.
• E)Phylogeny A and B are equally good representations of the relationships between these bacterial strains.

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