How to use the genotype combinations calculator
Find how many possible genotypes and dominant-recessive phenotypes a cross of several genes can produce. Enter number of independent loci in the field above; the possible genotypes, possible phenotypes with complete dominance are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “number of genotypes”, “number of phenotypes”, “genotype combinations for loci”, “calculate genotype combinations”, “find possible genotypes”.
Formula
Variables
- n — Number of independent loci
Worked example
With number of independent loci = 2, the calculator gives possible genotypes ≈ 9 genotypes; possible phenotypes with complete dominance ≈ 4 phenotypes.
Frequently asked questions
What is the genotype combinations calculator used for?
Find how many possible genotypes and dominant-recessive phenotypes a cross of several genes can produce. It helps with questions such as “number of genotypes”, “number of phenotypes”, “genotype combinations for loci”.
What is the formula for the genotype combinations calculation?
Possible genotypes (genotypes) = 3^n. Possible phenotypes with complete dominance (phenotypes) = 2^n. Here n is number of independent loci.
What inputs do I need for the genotype combinations calculator?
You need number of independent loci. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the genotype combinations calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the genotype combinations result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.