Dihybrid Cross Calculator

The Dihybrid Cross Calculator helps users predict the genetic outcome of a dihybrid cross, identifying phenotypes based on selected dominant and recessive traits from parental genotypes.

Use Our Dihybrid Cross Calculator

Step-by-Step Guide to Using the Dihybrid Cross Calculator

Introduction

The Dihybrid Cross Calculator helps you predict the genetic outcomes of two traits in offspring based on the genotypes of their parents. This is particularly suited for understanding inheritance patterns that follow Mendelian genetics.

Step 1: Setting the Traits

First, decide on the two traits you wish to analyze. Each trait has a dominant and a recessive allele.

  • Select the First Trait – Dominant Allele: Choose from options like Yellow (Y), Tall (T), Round (R), or Purple (P).
  • Select the First Trait – Recessive Allele: Choose from options like green (y), short (t), wrinkled (r), or white (p).
  • Select the Second Trait – Dominant Allele: Again, choose from the options such as Round (R), Tall (T), Purple (P), or Yellow (Y).
  • Select the Second Trait – Recessive Allele: Options include wrinkled (r), short (t), white (p), or green (y).

Step 2: Selecting Parent Genotypes

Select the genotypes for each of the parents involved in the cross.

  • Parent 1 Genotype: Choose from genotypes like DDHH (Homozygous Dominant for both traits), DDHh, DdHH, DdHh (Heterozygous for both traits), or ddhh (Homozygous Recessive).
  • Parent 2 Genotype: Similar options are available for the second parent: DDHH, DDHh, DdHH, DdHh, and ddhh.

Step 3: Calculating Genetic Outcomes

Once you have set the traits and selected the parent genotypes, the calculator will compute the genetic outcomes for their offspring.

  • Dominant-Dominant (9/16): This indicates the likelihood of offspring exhibiting both traits as dominant.
  • Dominant-Recessive (3/16): This result shows the probability of offspring having one dominant and one recessive trait.
  • Recessive-Dominant (3/16): This is the chance for offspring to have the opposite combination, with the first trait recessive and the second trait dominant.
  • Recessive-Recessive (1/16): This represents the likelihood of offspring displaying both traits as recessive.

The outcomes are displayed as percentages rounded to two decimal places.

Conclusion

By following these steps, you can effectively use the Dihybrid Cross Calculator to explore the inheritance patterns and understand the distribution of traits in offspring based on Mendelian principles.