Math and Science
Punnett Square Calculator
Punnett Square Calculator calculate monohybrid genotype and dominant or recessive phenotype probabilities from two parent genotypes.
Math and Science
Punnett Square Calculator
Calculate monohybrid genotype and dominant or recessive phenotype probabilities from two parent genotypes.
Formula
Offspring probability = parent-one gamete probability x parent-two gamete probability for each allele pairing.
About the Punnett Square Calculator
Calculate monohybrid genotype and dominant or recessive phenotype probabilities from two parent genotypes. This tool keeps the requested measurements separate and applies the named method instead of substituting an unrelated general estimate.
How the Punnett Square Calculator Works
Each diploid genotype contributes two equally likely alleles; all four pairings are combined into AA, Aa, and aa outcomes.
Formula
Offspring probability = parent-one gamete probability x parent-two gamete probability for each allele pairing.
The calculation runs in your browser. Values are validated for required ranges, compatible units, and method-specific restrictions before results are displayed.
Required Inputs
- Parent one genotype (required).
- Parent two genotype (required).
Results Reported
The result panel reports the final answer and the intermediate quantities needed to check the calculation:
- AA probability (%)
- Aa probability (%)
- aa probability (%)
- Dominant phenotype (%)
- Recessive phenotype (%)
- Genotype ratio AA:Aa:aa
Punnett Square Calculator Example
Select Example Data in the calculator to load this reproducible input set:
| Input | Example value |
|---|---|
| Parent one genotype | Aa |
| Parent two genotype | Aa |
How to Use the Calculator
- Confirm that the calculator title and formula match the quantity you need.
- Enter every required value using the unit shown with its field.
- Select Example Data to inspect a valid input set, or enter your own values and select Calculate.
- Review all reported values and the displayed formula before using the answer.
- Use Copy Result or Download CSV when you need a reusable record.
Accuracy and Limitations
This Mendelian model assumes one autosomal locus, complete dominance, independent gametes, and no linkage, penetrance effects, mutation, or selection.
Keep units consistent, use measurements that represent the actual situation, retain full precision during the calculation, and round only the final answer. Professional decisions may require current official rules, field measurements, laboratory methods, or specialist review.
Frequently Asked Questions
What does the Punnett Square Calculator calculate?
Calculate monohybrid genotype and dominant or recessive phenotype probabilities from two parent genotypes.
Which formula does the Punnett Square Calculator use?
Offspring probability = parent-one gamete probability x parent-two gamete probability for each allele pairing. Each diploid genotype contributes two equally likely alleles; all four pairings are combined into AA, Aa, and aa outcomes.
How should I use the Punnett Square Calculator result?
This Mendelian model assumes one autosomal locus, complete dominance, independent gametes, and no linkage, penetrance effects, mutation, or selection.