Calculate pairings – following Mendelian rules
The key terms around inheritance – explained in general, so the results above make sense.
A gene sits at a fixed spot on the chromosome, the locus. Every animal has two alleles per locus – one from each parent.
Recessive: only visible when both alleles carry the mutation. Dominant: visible with a single allele. Incomplete dominant: one allele = visible form, two alleles = a distinct super form (commonly called "co-dominant" in the hobby).
Homozygous = both alleles the same → the trait is visible. Heterozygous ("het") = only one allele mutated → a carrier, but not visible.
For incomplete-dominant genes the homozygous animal (two copies) looks different/stronger than with one copy – e.g. Super Toffee, BEL. Some super forms are not viable (lethal) and are flagged as such.
Some pairings can't tell for sure whether an animal is a carrier. It is then "poss. het" with a probability in percent.
Two different mutations on the same locus (e.g. Motley/Stripe). Both alleles are mutated and visible together – no wild-type allele left.
Several genes on different loci combine into their own name – e.g. Snow = Amel + Anery. The calculator detects such combinations automatically.
The calculator is here to help you understand pairings – it shows probabilities, not certainties. Whether an animal truly carries a gene is something only breeding itself can confirm.
Do you keep corn snakes yourself? See how and with which genetics I breed under My genetics & breeding.
Take the data with you: all 15 species of this calculator are available as downloadable files – ready to import into DragonSphere.
Tip: To document your keeping (animals, genetics, pairings) in a structured way, I recommend my app DragonSphere – on the App Store, free for up to 7 animals.
