Allele Frequency Calculator

Allele Frequency Calculator

Enter the number of individuals for each genotype:

Homozygous Dominant (AA):

Heterozygous (Aa):

Homozygous Recessive (aa):

🧬 Allele Frequency Calculator 

This calculator helps you understand how common genes are in a population.

In genetics, every person has two copies of a gene—one from each parent. These gene versions are called alleles:

• Dominant allele = A

• Recessive allele = a

🎯 What This Calculator Does:

It calculates how often each allele (A or a) appears in the entire group based on:

• People with AA (homozygous dominant)

• People with Aa (heterozygous)

• People with aa (homozygous recessive)

⚙️ How It Works:

It uses a biology rule called the Hardy-Weinberg principle:

• Total alleles = Number of people × 2 (because each person has 2 alleles)

• Formula:

  • 🟢 Dominant (A) frequency = (2×AA + Aa) ÷ total alleles

  • 🔵 Recessive (a) frequency = (2×aa + Aa) ÷ total alleles

✅ Example:

If you enter:

• AA = 30

• Aa = 20

• aa = 10

It tells you:

• Frequency of A (p) = 0.65

• Frequency of a (q) = 0.35

💡 Why Use It?

This tool is perfect for:

• Students learning genetics

• Teachers giving live examples

• Anyone curious about how traits spread in populations

It’s easy, fast, and science-backed!

This calculator is for educational purpose only.