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

Question 53

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. 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.


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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