To estimate: The phylogeny of the given taxa by plotting the changes on each of the possible unrooted trees and to determine the tree with fewest evolutionary changes. Introduction: Three species named 1, 2, and 3 are endemic to a group of islands. They all share a common ancestor named species 4. Species 4 serves as an out group. It has a huge population size which indicates that since islands colonized, no mutation has become fixed in its population. The genes were sequenced and ten nucleotide sites were located that differ among these four species. The nucleotide bases at these sites are as follows: Species 1: GCTGATGAGT Species 2: ATCAATGAGT Species 3: GTTGCAACGT Species 4: GTCAATGACA

Question

Suppose species 1, 2, and 3 are endemic to a group of islands (such as the Galápagos) and are all descended from species 4, an outgroup. We sequence a gene and find ten nucleotide sites that differ among the four species (among many other loci that do not vary). The nucleotide bases at these sites are Species 1: GCTGATGAGT Species 2: ATCAATGAGT Species 3: GTTGCAACGT Species 4: GTCAATGACA Estimate the phylogeny of these taxa by plotting the changes on each of the three possible trees and determine which tree requires the fewest evolutionary changes. (Please answer including what are 3 possible trees.? )

Answer 1

Question

Chapter 16, Problem 9PDT

Summary Introduction

To estimate: The phylogeny of the given taxa by plotting the changes on each of the possible unrooted trees and to determine the tree with fewest evolutionary changes.

Introduction: Three species named 1, 2, and 3 are endemic to a group of islands. They all share a common ancestor named species 4. Species 4 serves as an out group. It has a huge population size which indicates that since islands colonized, no mutation has become fixed in its population. The genes were sequenced and ten nucleotide sites were located that differ among these four species. The nucleotide bases at these sites are as follows:

Species 1: GCTGATGAGTSpecies 2: ATCAATGAGTSpecies 3: GTTGCAACGTSpecies 4: GTCAATGACA

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Suppose species 1, 2, and 3 are endemic to a group of islands (such as the Galápagos) and are all descended from species 4, an outgroup. We sequence a gene and find ten nucleotide sites that differ among the four species (among many other loci that do not vary). The nucleotide bases at these sites are Species 1: GCTGATGAGT Species 2: ATCAATGAGT Species 3: GTTGCAACGT Species 4: GTCAATGACA Estimate the phylogeny of these taxa by plotting the changes on each of the three possible trees and determine which tree requires the fewest evolutionary changes. (Please answer including what are 3 possible trees.? )

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