# Punnett Square Calculator

> Create a 2x2 monohybrid cross Punnett square grid and calculate offspring genotype and phenotype ratios.

**URL:** https://www.calculatoranswers.com/punnett-square-calculator
**Category:** Education

## Quick Answer

Generate a monohybrid cross Punnett square. Enter the genotypes of both parents to calculate offspring combinations, genotype ratios, and phenotype ratios.

## Definition

A Punnett square calculator is a biological genetics aid that predicts the probability of offspring genotypes and phenotypes from a cross. Specifically modeling a monohybrid cross, this tool maps the combination of alleles from two parents onto a visual two-by-two grid. It calculates the resulting genotypic ratios (such as one homozygous dominant to two heterozygous to one homozygous recessive) and phenotypic ratios based on Mendelian rules of dominance. Science students and educators use this calculator to visualize genetic inheritance and understand how recessive traits can appear in subsequent generations.

## How to Use

1. **Enter parent genotypes** — Type the two-letter alleles for Parent one and Parent two.
2. **Verify allele families** — Ensure both parents use the same case-sensitive letter family.
3. **Analyze ratios** — Read the calculated offspring genotype and phenotype ratios from the grid.

## Disclaimer

This calculator provides estimates for educational and planning purposes. Always consult a qualified professional for specific advice on financial, medical, legal, or other regulated decisions.

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