Textbook Question
Examine the following figure and answer the following questions.
How many clades are shown in the figure?
Ch. 1 - The Molecular Basis of Heredity, Variation, and Evolution
Sanders3rd EditionGenetic Analysis: An Integrated ApproachISBN: 9780135564172
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Table of contents
- Ch. 1 - The Molecular Basis of Heredity, Variation, and Evolution64
- Ch. 2 - Transmission Genetics144
- Ch. 3 - Cell Division and Chromosome Heredity81
- Ch. 4 - Gene Interaction87
- Ch. 5 - Genetic Linkage and Mapping in Eukaryotes103
- Ch. 6 - Genetic Analysis and Mapping in Bacteria and Bacteriophages73
- Ch. 7 - DNA Structure and Replication71
- Ch. 8 - Molecular Biology of Transcription and RNA Processing79
- Ch. 9 - The Molecular Biology of Translation110
- Ch. 10 - Eukaryotic Chromosome Abnormalities and Molecular Organization100
- Ch. 11 - Gene Mutation, DNA Repair, and Homologous Recombination86
- Ch. 12 - Regulation of Gene Expression in Bacteria and Bacteriophage90
- Ch. 13 - Regulation of Gene Expression in Eukaryotes38
- Ch. 14 - Analysis of Gene Function via Forward Genetics and Reverse Genetics72
- Ch. 15 - Recombinant DNA Technology and Its Applications69
- Ch. 16 - Genomics: Genetics from a Whole-Genome Perspective49
- Ch. 17 - Organelle Inheritance and the Evolution of Organelle Genomes27
- Ch. 18 - Developmental Genetics43
- Ch. 19 - Genetic Analysis of Quantitative Traits66
- Ch. 20 - Population Genetics and Evolution at the Population, Species, and Molecular Levels105
Sanders3rd EditionGenetic Analysis: An Integrated ApproachISBN: 9780135564172Not the one you use?Change textbook
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Sanders 3rd EditionCh. 1 - The Molecular Basis of Heredity, Variation, and EvolutionProblem 21
Sanders 3rd EditionCh. 1 - The Molecular Basis of Heredity, Variation, and EvolutionProblem 21Chapter 1, Problem 21
Using the following amino acid sequences obtained from different species of apes, construct a phylogenetic tree of the apes.
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Start by aligning the amino acid sequences from the different species of apes. Use a sequence alignment tool (e.g., ClustalW or MUSCLE) to identify conserved regions and differences among the sequences.
Calculate the pairwise sequence differences or similarities between each pair of species. This can be done by counting the number of mismatched amino acids in the aligned sequences.
Convert the pairwise differences into a distance matrix. The distance matrix will represent the evolutionary distances between the species based on their amino acid sequence differences.
Use the distance matrix to construct the phylogenetic tree. Apply a tree-building algorithm such as the Neighbor-Joining method or UPGMA (Unweighted Pair Group Method with Arithmetic Mean) to infer the relationships among the species.
Visualize the phylogenetic tree. Label the branches with the species names and ensure the branch lengths reflect the evolutionary distances calculated from the distance matrix.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Amino Acid Sequences
Amino acid sequences are the linear arrangements of amino acids in a protein, determined by the genetic code. These sequences can vary between species, reflecting evolutionary relationships. By comparing these sequences, scientists can infer how closely related different species are, which is essential for constructing phylogenetic trees.
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Sequencing Difficulties
Phylogenetic Tree
A phylogenetic tree is a diagram that represents the evolutionary relationships among various biological species based on their genetic characteristics. The branches of the tree illustrate how species diverged from common ancestors over time. Constructing a phylogenetic tree involves analyzing genetic data, such as amino acid sequences, to determine the order and timing of evolutionary events.
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Molecular Phylogenetics
Molecular phylogenetics is the study of evolutionary relationships using molecular data, primarily DNA, RNA, and protein sequences. This approach allows for more precise insights into the evolutionary history of organisms compared to morphological data alone. By applying statistical methods to molecular data, researchers can construct and validate phylogenetic trees that depict the genetic divergence among species.
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Related Practice
Textbook Question
A portion of a polypeptide contains the amino acids Trp-Lys-Met-Ala-Val. Write the possible mRNA and template-strand DNA sequences. (Hint: Use A/G and T/C to indicate that either adenine/guanine or thymine/cytosine could occur in a particular position, and use N to indicate that any DNA nucleotide could appear.)
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Textbook Question
Examine the following figure and answer the following questions.
What characteristics are shared by the mammalian clade and the primate clade? What characteristic distinguishes the primates from other members of the mammalian clade?
Textbook Question
The following segment of DNA is the template strand transcribed into mRNA:
5'-...GACATGGAA...-3'
What is the amino acid sequence produced by translation?
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Textbook Question
The following segment of DNA is the template strand transcribed into mRNA:
5'-...GACATGGAA...-3'
What is the sequence of mRNA created from this sequence?
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Textbook Question
Examine the following figure and answer the following questions.
What characteristic is shared by all clades in the figure?