Biology & Life Science
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Trihybrid Cross Calculator.
Enumerate three-locus offspring genotype probabilities from explicit parent genotypes.
Set your values
Results update as you type.
Offspring genotype probabilities
How to Use
Each parent is three adjacent loci (for example AaBbCc). The eight-by-eight cross enumerates genotype probabilities only; no dominance or phenotype interpretation is applied.
Use measured values and a documented convention. This calculator does not provide medical, veterinary, phenotype, or laboratory-method advice.
Use Cases
Predict offspring genotype ratios
Use this tool to quickly determine the expected genotype distribution for three traits in offspring, useful for genetics studies or breeding predictions.
Example: Cross AaBbCc x AaBbCc to see the 27 possible genotype combinations and their probabilities.
Educational tool for genetics
Ideal for students learning about Mendelian genetics and Punnett squares for multiple traits, providing a clear enumeration of outcomes.
Example: Verify manual calculations for a trihybrid cross in a homework assignment.
Frequently Asked Questions
- What is a trihybrid cross?
- A trihybrid cross involves parents that are heterozygous for three different traits. This calculator enumerates the probabilities of all possible offspring genotypes based on the parent genotypes you provide.
- How do I use this calculator?
- Enter the genotypes of both parents for three loci. The calculator will then compute the probability of each possible offspring genotype combination, assuming independent assortment and Mendelian inheritance.
- Does this calculator account for linkage?
- No, it assumes independent assortment of the three loci. If the genes are linked, the probabilities would differ, and this calculator would not be accurate.
Tips & Common Mistakes
Tips
- Ensure you enter the parent genotypes correctly, using standard allele notation (e.g., Aa, Bb, Cc).
- Remember that this calculator assumes independent assortment; if genes are linked, results may not match real-world data.
- Use the results to understand the probability of specific genotypes, which can be useful for breeding or genetic counseling.
- Double-check your input for each locus to avoid errors in the probability calculations.
Common Mistakes to Avoid
- Entering genotypes with incorrect allele order or missing alleles, leading to inaccurate results.
- Assuming the calculator accounts for linked genes or non-Mendelian inheritance patterns.
- Misinterpreting the output as phenotype probabilities instead of genotype probabilities.
Last updated: August 13, 2026