How to use the gene flow allele frequency calculator
Find the allele frequency of a population after one generation of migration from another population. Enter allele frequency in population, allele frequency in migrants, migration rate per generation in the fields above; the allele frequency after one generation, change in frequency are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “gene flow”, “migration allele frequency change”, “immigrant allele frequency”, “calculate gene flow allele frequency”, “find allele frequency after one generation”.
Formula
Variables
- q — Allele frequency in population
- qm — Allele frequency in migrants
- m — Migration rate per generation
Worked example
With allele frequency in population = 0.2, allele frequency in migrants = 0.6, migration rate per generation = 0.1, the calculator gives allele frequency after one generation ≈ 0.24; change in frequency ≈ 0.04.
Frequently asked questions
What is the gene flow allele frequency calculator used for?
Find the allele frequency of a population after one generation of migration from another population. It helps with questions such as “gene flow”, “migration allele frequency change”, “immigrant allele frequency”.
What is the formula for the gene flow allele frequency calculation?
Allele frequency after one generation = (1-m) × q+m × qm. Change in frequency = [Allele frequency after one generation]-q. Here q is allele frequency in population, qm is allele frequency in migrants, m is migration rate per generation.
What inputs do I need for the gene flow allele frequency calculator?
You need allele frequency in population, allele frequency in migrants, migration rate per generation. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the gene flow allele frequency calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the gene flow allele frequency result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.