Punnett Square Calculator

Category: Biology

- March 10, 2025

| |

Mother's genotype

AA Aa aa

Father's genotype

AA Aa aa

Chance for AA

0 %

Chance for Aa

0 %

Chance for aa

0 %

Punnett Square

♂ \ ♀	A	A
A	AA	AA
A	AA	AA

If you need 2 traits and 4 alleles, search for the larger, dihybrid cross Punnett Square calculator.

Genotype to phenotype

Genotype	Phenotype
AA	A
Aa	A
aa	a

Probability of a genotype: \( P = \frac{\text{number of occurrences of genotype}}{\text{total offspring combinations}} \times 100 \)

What is a Punnett Square?

A Punnett Square is a simple diagram used to predict the genetic makeup of offspring based on the genes of the parents. It helps visualize the probability of different genetic combinations occurring in the next generation.

How to Use the Punnett Square Calculator

This calculator simplifies the process of determining offspring genotypes and their likelihood. Follow these steps:

Select the genotype of the mother (AA, Aa, or aa).
Select the genotype of the father (AA, Aa, or aa).
Click the Calculate button to generate the results.
View the probability of different genotypes appearing in the offspring.
The Punnett Square table will update to show all possible combinations.

Understanding the Results

Once you click Calculate, the tool will display:

The percentage chance of each possible genotype (AA, Aa, aa).
A visual representation of the Punnett Square.
A table that maps genotypes to their phenotypic traits.

Why is This Useful?

This tool is valuable for anyone studying genetics, breeding patterns, or hereditary traits. It can be used to:

Predict hereditary conditions in offspring.
Understand dominant and recessive gene inheritance.
Support biology and genetics education.

Frequently Asked Questions (FAQ)

What do AA, Aa, and aa mean?

These represent different genetic combinations:

AA - Homozygous dominant
Aa - Heterozygous (one dominant and one recessive allele)
aa - Homozygous recessive

What is the difference between genotype and phenotype?

Genotype refers to the genetic makeup (AA, Aa, or aa), while phenotype is the observable trait (e.g., dominant or recessive characteristic).

Can this calculator handle multiple traits?

This tool focuses on single-trait inheritance. For more complex calculations, a dihybrid Punnett Square calculator is needed.

What if both parents are heterozygous (Aa)?

In this case, there is a 25% chance of AA, 50% chance of Aa, and 25% chance of aa.

Final Thoughts

The Punnett Square Calculator is an easy-to-use tool for understanding genetic inheritance. By selecting parental genotypes, users can quickly determine offspring probabilities, making it a great educational resource.