Allele Frequency Calculator


Enter Population Counts

For a single gene with two alleles (A and a)

Allele Frequency Results

Population Statistics
Sample Size (N):
100
Number of Alleles:
200
Frequency of A (p)
0.45
Frequency of a (q)
0.55
Genotype Frequencies
AA (p²):
0.2025
Aa (2pq):
0.4950
aa (q²):
0.3025
Genotype Distribution
AA
20.3%
Aa
49.5%
aa
30.3%

Hardy-Weinberg Equilibrium Check

The observed genotype frequencies match the expected Hardy-Weinberg frequencies within a margin of error of 0.01.

Chi-square test: χ² = 0.042, p > 0.05. The population appears to be in Hardy-Weinberg equilibrium.

About Allele Frequencies

  • For a diploid gene locus with two alleles (A and a), the Hardy-Weinberg principle states that p² + 2pq + q² = 1
  • p represents the frequency of the dominant allele A, and q represents the frequency of recessive allele a
  • p + q = 1, meaning the allele frequencies must sum to 1
  • p² represents the frequency of homozygous dominant (AA)
  • 2pq represents the frequency of heterozygous (Aa)
  • q² represents the frequency of homozygous recessive (aa)
  • A population in Hardy-Weinberg equilibrium is not evolving and shows no genetic drift, selection, mutation, or migration

Understanding the Allele Frequency Calculator

The Allele Frequency Calculator is a handy tool for anyone interested in genetics. It helps you figure out the frequency of different alleles in a population. This is especially useful in studies of evolution, breeding, and conservation. By entering data about genotype counts or known allele frequencies, you can gain important insights into genetic variations.

How Does It Work?

This calculator operates using the principles of population genetics. You can choose different methods to calculate allele frequencies based on the information you have. The available methods include entering genotype counts, using known allele frequencies, or doing advanced population genetics calculations. Each option allows you to explore different aspects of genetic data.

Key Features of the Calculator

The Allele Frequency Calculator offers several features to assist users:

  • User-friendly interface: It's easy to navigate and input data.
  • Multiple calculation methods: Users can select from genotype counts, known frequencies, or advanced parameters.
  • Detailed results: The calculator provides comprehensive output, including allele frequencies and genotype distributions.

Inputs You Can Provide

When you use the calculator, you'll need to provide some basic inputs. Depending on the method you choose, you may be asked for genotype counts, known allele frequencies, or Fitness values for different genotypes. These inputs can lead to a better understanding of how alleles are distributed in your population.

Interpreting Your Results

The results generated by the calculator are rich in detail. You’ll see Statistics such as sample size and the frequency of each allele. You will also receive information about genotype frequencies. This data can help analyse the genetic structure of the population you are studying.

Advanced Population Genetics

For those interested in deeper analysis, the calculator includes an advanced section. This allows you to input selection coefficients and observe how allele frequencies change over generations. You can see how various factors might influence the population’s genetic makeup over time.

The Importance of Hardy-Weinberg Equilibrium

The calculator also checks if your population is in Hardy-Weinberg equilibrium. This principle states that allele and genotype frequencies remain constant from generation to generation in the absence of evolutionary influences. If your results indicate equilibrium, it suggests that the population is stable and not undergoing significant evolutionary changes.

Why Use the Allele Frequency Calculator?

Using the Allele Frequency Calculator helps students, researchers, and enthusiasts in genetics understand key concepts. It simplifies complex calculations and provides visual representations of data. By using this tool, you can gain a better grasp of genetic diversity and the factors that influence allele frequencies in populations.