Textbook Question
Compare and contrast the terms in each of the following pairs:
Founder effect and Genetic bottleneck
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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 3
Sanders 3rd EditionCh. 20 - Population Genetics and Evolution at the Population, Species, and Molecular LevelsProblem 3Chapter 20, Problem 3
Identify and describe the evolutionary forces that can cause allele frequencies to change from one generation to the next.
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Understand that evolutionary forces are mechanisms that cause changes in allele frequencies within a population over generations, leading to evolution.
Identify the main evolutionary forces: natural selection, genetic drift, gene flow (migration), mutation, and non-random mating.
Describe natural selection as the process where alleles that confer a survival or reproductive advantage increase in frequency because individuals with those alleles are more likely to survive and reproduce.
Explain genetic drift as random fluctuations in allele frequencies due to chance events, which are especially significant in small populations.
Discuss gene flow as the movement of alleles between populations through migration, which can introduce new alleles or change allele frequencies in a population.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Natural Selection
Natural selection is the process where individuals with advantageous traits have higher survival and reproduction rates, causing those alleles to increase in frequency over generations. It drives adaptation by favoring beneficial genetic variations in a population.
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05:54
Natural Selection
Genetic Drift
Genetic drift refers to random changes in allele frequencies due to chance events, especially in small populations. It can lead to the loss or fixation of alleles independently of their selective advantage, reducing genetic variation over time.
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10:15Genetic Drift
Gene Flow
Gene flow is the movement of alleles between populations through migration or interbreeding. It introduces new genetic material, which can alter allele frequencies and increase genetic diversity within a population.
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09:09Mapping Genes
Related Practice
Textbook Question
In a population, what is the consequence of inbreeding? Does inbreeding change allele frequencies? What is the effect of inbreeding with regard to rare recessive alleles in a population?
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What insights have analyses of human mitochondrial DNA provided into our recent evolutionary past?
Textbook Question
What lines of evidence support the hypothesis that modern humans evolved in Africa and then subsequently migrated throughout the globe?
Textbook Question
Describe how natural selection can produce balanced polymorphism of allele frequencies through selection that favors heterozygotes.
Textbook Question
Discuss how both gains and losses of regulatory elements may lead to human-specific traits.