Table of contents
- 1. Introduction to Genetics51m
- 2. Mendel's Laws of Inheritance3h 37m
- 3. Extensions to Mendelian Inheritance2h 41m
- 4. Genetic Mapping and Linkage2h 28m
- 5. Genetics of Bacteria and Viruses1h 21m
- 6. Chromosomal Variation1h 48m
- 7. DNA and Chromosome Structure56m
- 8. DNA Replication1h 10m
- 9. Mitosis and Meiosis1h 34m
- 10. Transcription1h 0m
- 11. Translation58m
- 12. Gene Regulation in Prokaryotes1h 19m
- 13. Gene Regulation in Eukaryotes44m
- 14. Genetic Control of Development44m
- 15. Genomes and Genomics1h 50m
- 16. Transposable Elements47m
- 17. Mutation, Repair, and Recombination1h 6m
- 18. Molecular Genetic Tools19m
- 19. Cancer Genetics29m
- 20. Quantitative Genetics1h 26m
- 21. Population Genetics50m
- 22. Evolutionary Genetics29m
21. Population Genetics
Allelic Frequency Changes
1:41 minutes
Problem 9b
Textbook Question
Textbook QuestionIf 4 percent of a population in equilibrium expresses a recessive trait, what is the probability that the offspring of two individuals who do not express the trait will express it?
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Hardy-Weinberg Equilibrium
The Hardy-Weinberg Equilibrium is a principle that describes the genetic variation in a population that is not evolving. It provides a mathematical model to predict allele frequencies and genotype frequencies in a population under certain conditions, such as no mutation, migration, or selection. This concept is essential for understanding how traits are distributed in a population and serves as a baseline for studying genetic changes.
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Hardy Weinberg
Recessive Trait
A recessive trait is a phenotype that only manifests when an individual has two copies of the recessive allele. In the context of genetics, if a trait is recessive, it can be masked by a dominant allele. Understanding how recessive traits are inherited is crucial for predicting the likelihood of offspring expressing these traits, especially when considering the genotypes of the parents.
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Traits and Variance
Punnett Square
A Punnett Square is a diagram used to predict the genotypes of offspring from a cross between two individuals. It allows for the visualization of how alleles combine during reproduction, helping to determine the probability of inheriting specific traits. In this scenario, using a Punnett Square can clarify the likelihood that offspring of two non-expressing individuals will express a recessive trait, given the allele frequencies in the population.
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Chi Square Analysis
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