QQuestionBiology
QuestionBiology
Explain how fitness can change the allele frequency of a population.
11 months agoReport content
Answer
Full Solution Locked
Sign in to view the complete step-by-step solution and unlock all study resources.
Step 1:I'll solve this population genetics problem step by step, focusing on how fitness impacts allele frequencies.
Step 2:: Understanding Allele Frequency and Fitness
Allele frequency represents the proportion of a specific allele in a population. Fitness describes an allele's ability to contribute to subsequent generations through reproductive success.
Step 3:: Defining Fitness
Fitness is mathematically represented by $$w_{i}$$, where:
- w_{i} = relative fitness of a specific genotype - Higher fitness means greater reproductive success - Fitness determines how many offspring an individual produces
Step 4:: Selection Mechanism
- Represented by the equation: $$p' = \frac{p w_{AA}}{p^{2}w_{AA} + 2pq w_{Aa} + q^{2}w_{aa}}
Natural selection changes allele frequencies through differential reproductive success: - Genotypes with higher fitness produce more offspring - This shifts population genetic composition over generations
Step 5:: Fitness Impact Examples
- Beneficial alleles increase in frequency - Deleterious alleles decrease in frequency - Neutral alleles maintain relatively stable frequencies
Final Answer
Fitness changes allele frequencies by systematically favoring genotypes with higher reproductive success, gradually shifting population genetic composition through natural selection.
Need Help with Homework?
Stuck on a difficult problem? We've got you covered:
- Post your question or upload an image
- Get instant step-by-step solutions
- Learn from our AI and community of students