CalculatorCast
Math Finance Health & Fitness Date & Time Unit Converters Computer Physics Chemistry Construction Engineering Statistics Education Everyday Life Biology Automotive Cooking & Food Sports & Fitness Real Estate Photography Electrical Agriculture Travel Business
All Calculators Favorites ()
English Español Français Deutsch Português Italiano Nederlands Polski Türkçe 日本語 한국어 Svenska Norsk Dansk Suomi עברית

Genetics Calculator

Monohybrid cross genotype ratios from two parent genotypes.

Introduction

Genetics Calculator — Monohybrid cross genotype ratios from two parent genotypes. Enter Parent 1 genotype, Parent 2 genotype to get an instant, accurate result.

Formula

A general monohybrid-cross tool: crosses two single-gene genotypes (e.g. Aa × Aa) by pairing each allele of parent 1 with each allele of parent 2, then tallies the resulting offspring genotype ratios — the same Punnett-square logic used for a single trait.

Step-by-step

  1. Enter the Parent 1 genotype.
  2. Enter the Parent 2 genotype.
  3. Click Calculate to see your result instantly.

Real-world example

Example: With Parent 1 genotype = Aa, Parent 2 genotype = Aa, the Genetics Calculator gives Genotypes: AA, Aa, Aa, aa, Ratios: 1, 2, 1.

Frequently Asked Questions

How do I enter a genotype?
Use two letters representing the two alleles at one gene, e.g. "Aa" for heterozygous, "AA" for homozygous dominant, or "aa" for homozygous recessive.
Does this handle two genes at once (dihybrid crosses)?
No, this tool works with a single gene (two alleles) at a time; each gene should be crossed separately.
What inputs does the Genetics Calculator need?
You'll need to provide: Parent 1 genotype, Parent 2 genotype. All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.
How accurate is the Genetics Calculator?
The Genetics Calculator applies the formula exactly as calculated — A general monohybrid-cross tool: crosses two single-gene genotypes (e.g. Aa × Aa) by pairing each allele of parent 1 with each allele of parent 2, then tallies the resulting offspring genotype ratios — the same Punnett-square logic used for a single trait. — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.
Is the Genetics Calculator free to use?
Yes, the Genetics Calculator is completely free, requires no signup, and runs instantly in your browser.

About the Genetics Calculator

The Genetics Calculator uses a real, verifiable formula — A general monohybrid-cross tool: crosses two single-gene genotypes (e.g. Aa × Aa) by pairing each allele of parent 1 with each allele of parent 2, then tallies the resulting offspring genotype ratios — the same Punnett-square logic used for a single trait. — so results are accurate every time, not an approximation.