Trihybrid Cross Calculator
Chemistry & BiologyPredict all 27 possible offspring genotype probabilities for three independent genes at once from two parent genotypes.
AABBCC
Probability of genotype AABBCC (gene 1 homozygous dominant, gene 2 homozygous dominant, gene 3 homozygous dominant).
AABBCc
3.13
Probability of genotype AABBCc (gene 1 homozygous dominant, gene 2 homozygous dominant, gene 3 heterozygous).
AABBcc
1.56
Probability of genotype AABBcc (gene 1 homozygous dominant, gene 2 homozygous dominant, gene 3 homozygous recessive).
AABbCC
3.13
Probability of genotype AABbCC (gene 1 homozygous dominant, gene 2 heterozygous, gene 3 homozygous dominant).
AABbCc
6.25
Probability of genotype AABbCc (gene 1 homozygous dominant, gene 2 heterozygous, gene 3 heterozygous).
AABbcc
3.13
Probability of genotype AABbcc (gene 1 homozygous dominant, gene 2 heterozygous, gene 3 homozygous recessive).
AAbbCC
1.56
Probability of genotype AAbbCC (gene 1 homozygous dominant, gene 2 homozygous recessive, gene 3 homozygous dominant).
AAbbCc
3.13
Probability of genotype AAbbCc (gene 1 homozygous dominant, gene 2 homozygous recessive, gene 3 heterozygous).
AAbbcc
1.56
Probability of genotype AAbbcc (gene 1 homozygous dominant, gene 2 homozygous recessive, gene 3 homozygous recessive).
AaBBCC
3.13
Probability of genotype AaBBCC (gene 1 heterozygous, gene 2 homozygous dominant, gene 3 homozygous dominant).
AaBBCc
6.25
Probability of genotype AaBBCc (gene 1 heterozygous, gene 2 homozygous dominant, gene 3 heterozygous).
AaBBcc
3.13
Probability of genotype AaBBcc (gene 1 heterozygous, gene 2 homozygous dominant, gene 3 homozygous recessive).
AaBbCC
6.25
Probability of genotype AaBbCC (gene 1 heterozygous, gene 2 heterozygous, gene 3 homozygous dominant).
AaBbCc
12.50
Probability of genotype AaBbCc (gene 1 heterozygous, gene 2 heterozygous, gene 3 heterozygous).
AaBbcc
6.25
Probability of genotype AaBbcc (gene 1 heterozygous, gene 2 heterozygous, gene 3 homozygous recessive).
AabbCC
3.13
Probability of genotype AabbCC (gene 1 heterozygous, gene 2 homozygous recessive, gene 3 homozygous dominant).
AabbCc
6.25
Probability of genotype AabbCc (gene 1 heterozygous, gene 2 homozygous recessive, gene 3 heterozygous).
Aabbcc
3.13
Probability of genotype Aabbcc (gene 1 heterozygous, gene 2 homozygous recessive, gene 3 homozygous recessive).
aaBBCC
1.56
Probability of genotype aaBBCC (gene 1 homozygous recessive, gene 2 homozygous dominant, gene 3 homozygous dominant).
aaBBCc
3.13
Probability of genotype aaBBCc (gene 1 homozygous recessive, gene 2 homozygous dominant, gene 3 heterozygous).
aaBBcc
1.56
Probability of genotype aaBBcc (gene 1 homozygous recessive, gene 2 homozygous dominant, gene 3 homozygous recessive).
aaBbCC
3.13
Probability of genotype aaBbCC (gene 1 homozygous recessive, gene 2 heterozygous, gene 3 homozygous dominant).
aaBbCc
6.25
Probability of genotype aaBbCc (gene 1 homozygous recessive, gene 2 heterozygous, gene 3 heterozygous).
aaBbcc
3.13
Probability of genotype aaBbcc (gene 1 homozygous recessive, gene 2 heterozygous, gene 3 homozygous recessive).
aabbCC
1.56
Probability of genotype aabbCC (gene 1 homozygous recessive, gene 2 homozygous recessive, gene 3 homozygous dominant).
aabbCc
3.13
Probability of genotype aabbCc (gene 1 homozygous recessive, gene 2 homozygous recessive, gene 3 heterozygous).
aabbcc
1.56
Probability of genotype aabbcc (gene 1 homozygous recessive, gene 2 homozygous recessive, gene 3 homozygous recessive).
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Chemistry & Biology calculators
Calculator Stats
Creators
Odeh Ahwal0people find this calculator helpful
Views
Helpful
Saved
Embeds
Chemistry & Biology calculators
Frequently Asked Questions
What is a trihybrid cross?
A trihybrid cross tracks three different genes at the same time, assuming all three are inherited independently of each other.
Why are there 27 results instead of the 64 boxes shown on some reference Punnett square grids?
A 64-box grid shows every possible pairing of egg and sperm cells, but many different pairings produce the identical genetic result. For example, mother contributing a dominant allele and father contributing a recessive one gives the same outcome as the reverse. There are only 27 truly distinct genetic outcomes (3 possibilities for gene 1, times 3 for gene 2, times 3 for gene 3), and this calculator lists each one exactly once with its exact percentage, rather than repeating results across a grid.
How were the 27 percentages calculated?
For each gene, the probability of each of the three possible offspring genotypes is calculated independently, then the three independent probabilities are multiplied together for every one of the 27 combinations, following the standard rule that independent probabilities multiply.
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