The way in which retroviruses use the enzyme reverse transcriptase. Introduction: Genes are sets of nucleotides that codes for a particular protein. It consists of all the information that is required for the production of proteins. Gene expression is a process by which genetic information from a gene is used for the production of proteins with appropriate functions.

Question

You have returned to college to become a phylogeneticist. One of the first things you wish to do is determine how mammals, birds, and reptiles are related. Like any good scientist, you need to consider all available data objectively and without a preconceived “correct” answer. In pursuit of that, you should produce a phylogenetic tree based only on morphological features that show birds and mammals are more closely related. You will then produce a totally different tree, also using morphological features, that shows birds and reptiles are more closely related. Do not forget to include all three groups in both your trees. Based solely off the trees you produce, which relationship would you consider the more likely and why? Once you have answered that question, provide a brief summary of the “modern” understanding of the relationship between these three groups.

Answer 1

Question

Chapter 13.6, Problem 3C

Summary Introduction

To explain: The way in which retroviruses use the enzyme reverse transcriptase.

Introduction: Genes are sets of nucleotides that codes for a particular protein. It consists of all the information that is required for the production of proteins. Gene expression is a process by which genetic information from a gene is used for the production of proteins with appropriate functions.

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You have returned to college to become a phylogeneticist. One of the first things you wish to do is determine how mammals, birds, and reptiles are related. Like any good scientist, you need to consider all available data objectively and without a preconceived “correct” answer. In pursuit of that, you should produce a phylogenetic tree based only on morphological features that show birds and mammals are more closely related. You will then produce a totally different tree, also using morphological features, that shows birds and reptiles are more closely related. Do not forget to include all three groups in both your trees. Based solely off the trees you produce, which relationship would you consider the more likely and why? Once you have answered that question, provide a brief summary of the “modern” understanding of the relationship between these three groups.

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