Western Hognose Genetics Calculator

What you can enter

Tap the exact genotype you want for each parent, such as Het or Visual Albino, or Superconda. No typing is needed; the optional search also understands phrases like “het albino” and can fill a parent from a morph name. It accepts:

• Recessive genes, as visual or as het (one hidden copy): Albino, Axanthic, Sable, Toffee Belly, Swiss Chocolate, Lavender, Leucistic, Frost, Hypo, Pink Pastel Albino and Desert.
• Anaconda and Superconda.
• The Arctic and Antarctic gene: Arctic, Superarctic, Antarctic, Superantarctic and Antarctic Arctic.

Each parent holds one genotype per gene: Het or visual for a recessive gene, Anaconda or Superconda, and one or two copies of Arctic or Antarctic. Arctic and Antarctic share one gene, so a parent with one copy of each is Antarctic Arctic.

Reading the results

• Each outcome shows its odds as a percentage and a fraction, whether it is visual, het only or wildtype, and its morph name.
• Het percentages follow the hobby convention: among the babies that do not show a recessive gene, the share expected to carry it, rounded down. A 2/3 chance reads as 66% het.
• Not documented marks a genetically valid combination that is not a named morph in the Hognose Hub morph guide. Its name is built from its traits.
• Outcomes are listed from most to least likely. The Punnett breakdown shows one square per gene and how the squares multiply into the full list.
• The example clutch is one random draw from the odds, not a prediction. Re-roll it to see how much real clutches can vary.

Limits to know

• Only the genes listed above are calculated. Dominant and polygenic (line-bred) traits are not part of the calculation.
• Parents are entered as visual or het. There is no input for a possible het, such as a 66% het parent.
• Each gene is treated as inherited independently of the others.
• Results are the expected odds for a pairing, not a guarantee for any single clutch.
• Morph photos are not shown here. A documented morph's name links to its page on Hognose Hub, where the community photos and credits live.
• Nothing you enter is saved, and using the calculator never adds animals, pairings or clutches to a KeeperOS account.