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Evolution Frequency Equation:
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The evolution frequency equation calculates how allele frequencies change over time under constant evolutionary pressure, accounting for allele length effects. It models exponential growth or decay of allele frequencies in a population.
The calculator uses the evolution frequency equation:
Where:
Explanation: The equation models exponential change in allele frequency over time, where positive rates lead to frequency increase and negative rates lead to decrease.
Details: Calculating allele frequency changes helps predict evolutionary trajectories, understand selection pressures, and model population genetics scenarios.
Tips: Enter initial frequency (between 0 and 1), rate of change (can be positive or negative), and time period. All values must be valid numbers.
Q1: What does a negative rate value mean?
A: A negative rate indicates the allele frequency is decreasing over time, which could happen due to negative selection or genetic drift.
Q2: How does allele length affect the rate?
A: Longer alleles often have different mutation rates and selection coefficients, which would be reflected in the rate parameter (r).
Q3: What are typical rate values?
A: Rates vary widely but are typically small (e.g., 0.001 to 0.1 for strong selection). The exact value depends on selection pressure and population size.
Q4: When is this model most accurate?
A: This simple model works best for large populations with constant selection pressure and no migration or mutation.
Q5: How can I account for multiple alleles?
A: For multiple alleles, you would need to run separate calculations for each allele and ensure frequencies sum to 1.