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
Hardy Weinberg
2:04 minutes
Problem 26b
Textbook Question
Textbook QuestionAssume that the flower population described in the previous problem undergoes a different pattern of predation. Flower-color determination and the starting frequencies of C₁ and C₂ are as described above, but the new insects attack yellow and red flowers, not orange flowers. As a result of the predation pattern, the relative fitness values are C₁C₁ = 0.40, C₁C₂ = 1.0, and C₂C₂ = 0.80. What are the allele frequencies after one generation of natural selection?
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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 a fundamental mechanism of evolution where individuals with traits better suited to their environment tend to survive and reproduce more than those with less advantageous traits. In this scenario, the predation pattern affects the survival of flower colors, influencing which alleles are passed on to the next generation based on their relative fitness.
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Relative Fitness
Relative fitness refers to the reproductive success of a genotype compared to others in the population. In this case, the fitness values assigned to the genotypes C₁C₁, C₁C₂, and C₂C₂ indicate how well each genotype survives predation and contributes to the next generation's allele frequencies, impacting the overall genetic makeup of the population.
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Allele Frequency
Allele frequency is the proportion of a specific allele among all allele copies in a population. After one generation of natural selection, the allele frequencies of C₁ and C₂ will change based on the relative fitness values, reflecting the survival advantage of certain genotypes and leading to a shift in the genetic composition of the flower population.
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