Textbook Question
Evaluate the following pedigree, and answer the questions below for individual IV-1. Is IV-1 an inbred individual? If so, who is/are the common ancestor(s)?
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Ch. 20 - Population Genetics and Evolution at the Population, Species, and Molecular Levels
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. 20 - Population Genetics and Evolution at the Population, Species, and Molecular LevelsProblem 34b
Sanders 3rd EditionCh. 20 - Population Genetics and Evolution at the Population, Species, and Molecular LevelsProblem 34bChapter 20, Problem 34b
Evaluate the following pedigree, and answer the questions below. Who is/are the common ancestor(s) of the inbred individual(s)?
Verified step by step guidance1
Examine the pedigree chart to identify the inbred individual(s). Inbreeding occurs when an individual has parents who are related by descent, meaning they share a common ancestor.
Trace the lineage of the inbred individual(s) to locate the parents. Observe if the parents are related and share a common ancestor.
Identify the common ancestor(s) by following the lines connecting the parents of the inbred individual(s) to their ancestors. Look for individuals who appear in both parental lineages.
Verify the relationship by ensuring that the identified common ancestor(s) contribute genetic material to both parents of the inbred individual(s). This confirms the shared ancestry.
Summarize the findings by listing the common ancestor(s) and explaining their role in the inbreeding observed in the pedigree chart.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Pedigree Analysis
Pedigree analysis is a method used in genetics to trace the inheritance of traits through generations within a family. It involves creating a diagram that represents family relationships and the transmission of genetic conditions. By analyzing the pedigree, one can identify patterns of inheritance, such as autosomal dominant or recessive traits, and determine the likelihood of traits appearing in future generations.
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Pedigree Flowchart
Inbreeding
Inbreeding refers to the mating of individuals who are closely related genetically, which can increase the probability of offspring inheriting genetic disorders. In a pedigree, inbred individuals often share common ancestors, which can be identified by tracing their lineage. Understanding inbreeding is crucial for evaluating genetic risks and the potential for expressing recessive traits in offspring.
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Common Ancestors
Common ancestors are individuals from whom two or more individuals are directly descended. In the context of a pedigree, identifying common ancestors helps to understand the genetic relationships and potential shared traits among family members. This concept is essential for evaluating inbreeding and assessing the genetic health of a population, as it highlights the genetic connections that may influence trait inheritance.
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Related Practice
Textbook Question
Evaluate the following pedigree, and answer the questions below for individual IV-1. What is F for this individual?
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Textbook Question
Evaluate the following pedigree, and answer the questions below. Which individual(s) in this family is/are inbred?
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Textbook Question
Evaluate the following pedigree, and answer the questions below. Calculate F for any inbred members of this family.
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Textbook Question
The following is a partial pedigree of the British royal family. The family contains several inbred individuals and a number of inbreeding pathways. Carefully evaluate the pedigree, and identify the pathways and common ancestors that produce inbred individuals A (Alice in generation IV), B (George VI in generation VI), and C (Charles in generation VIII).
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Textbook Question
Draw a separate hypothetical pedigree identifying the inbred individuals and the inbreeding pathways for each of the following inbreeding coefficients:
F=4(1/2)⁶
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