Punnet Square Calculator

The Punnet Square Calculator allows users to input alleles from two parents and calculates the probabilities of resulting genotypes and phenotypes, including dominant, recessive, homozygous dominant, heterozygous, and homozygous recessive outcomes, displaying them in a percentage format.

Use Our Punnet Square Calculator

How to Use the Punnet Square Calculator

The Punnet Square Calculator is a tool designed to help you understand genetic probability in offspring based on the genetic makeup of two parents. By entering specific alleles for each parent, you can calculate various probabilities of genetic outcomes.

Step 1: Input Parent Alleles

Begin by entering the alleles for each parent. Each parent has two alleles that define the genetic traits they contribute to their offspring. You will input these alleles using selectable options available in the calculator interface.

  • Parent 1 – First Allele: Select either “Dominant (A)” or “Recessive (a)” from the dropdown menu.
  • Parent 1 – Second Allele: Again, choose between “Dominant (A)” or “Recessive (a)”.
  • Parent 2 – First Allele: Select “Dominant (A)” or “Recessive (a)” from the dropdown.
  • Parent 2 – Second Allele: Choose between “Dominant (A)” or “Recessive (a)”.

Ensure all inputs are filled correctly as these values are required for the calculation of outcomes. The selections should reflect the genetic combinations you are investigating.

Step 2: Interpret the Results

Once the alleles for both parents are set, the calculator provides you with several probabilities regarding the potential genotypes and phenotypes of the offspring. Review these results:

  • Dominant Phenotype Probability: This shows the likelihood that the offspring will express the dominant trait, represented as a percentage.
  • Recessive Phenotype Probability: Displays the probability of the offspring expressing the recessive trait.
  • Homozygous Dominant (AA) Probability: Indicates the chance that the offspring will have two dominant alleles.
  • Heterozygous (Aa) Probability: This probability reflects the likelihood of the offspring having one dominant allele and one recessive allele.
  • Homozygous Recessive (aa) Probability: Represents the probability of having two recessive alleles.

Each probability is given in percentage form with one decimal precision, allowing for detailed analysis of genetic outcomes.