Hognose Morph Calculator

Pick each western hognose parent's genes, or use your own recorded hognoses, to see every possible baby morph as an exact fraction per egg. The calculator shows het odds, Superconda, Super Arctic and reviewed named combinations like Snow and Yeti. Line-bred colors stay visible without invented odds. Each result uses the genes you enter and the reported, sourced notes.

How hognose genes pass to the babies

Each egg gets one copy from each parent. The odds describe each egg, not a guaranteed clutch.

• Recessive genes such as Albino need two copies to show
• A het carries one hidden copy of a recessive gene
• Anaconda shows with one copy; two copies make Superconda
• Arctic shows with one copy; two copies make Super Arctic
• Snow has two copies each of Albino and Axanthic
• Yeti adds one copy of Anaconda to Snow
• Toffeeconda and Candy differ by one or two Anaconda copies

What the calculator will not guess

These stay under Not included, with the reason shown.

• Line-bred Red Line, Extreme Red, Purple Line and Tiger
• Polygenic Twinspot and Lemon Ghost
• Jaguar, Yellow Pastel and Shadow, whose inheritance is unsettled
• Pistachio, whose inheritance only one of our references describes
• Albino together with Pink Pastel Albino, whose relation is unsettled
• Health beyond the reported, sourced notes

Frequently asked questions

How does a hognose morph calculator work?

Each parent passes one copy of every gene to each baby. The calculator lists the combinations those copies can make, adds their chances and names the results using reviewed rules. It calculates 11 predictable western hognose genes. The odds are per egg, so the actual number of each morph in a clutch can vary.

What do two Anacondas produce?

Two one-copy Anacondas give each egg a 1/4 chance of Superconda, a 1/2 chance of Anaconda and a 1/4 chance of Normal, assuming no other entered genes. Superconda has two Anaconda copies. Superconda paired with Normal produces all one-copy Anacondas.

Why does Red Line show no odds?

Red Line is built by selecting red animals over generations, rather than passing on one gene with simple ratios. There are no Red Line hets or supers. Breeders pair red animals with red animals to keep the color strong. Extreme Red is also line-bred, and outcrossing dilutes its color. You can record these traits alongside genes such as Albino, but the calculator gives no odds for them.

Can two normal-looking hognoses produce Albino?

Yes, if both are het Albino. Each egg has a 1/4 chance of visual Albino, a 1/2 chance of a normal-looking het and a 1/4 chance of carrying no Albino. Taken together, the normal-looking babies have a 3/4 chance; two out of three of those carry Albino.

How do you make a Snow hognose?

Snow has two copies of Albino and two copies of Axanthic. Snow paired with Snow produces all Snow babies, assuming no other entered genes. Two double hets, each carrying one copy of Albino and one of Axanthic, give each egg a 1/16 chance of Snow.

Why are Albino and Pink Pastel Albino left out together?

Breeders keep Pink Pastel Albino as its own recessive gene, but published crosses have not settled whether it is separate from standard Albino or another form of it. When both appear anywhere in a pairing, the calculator leaves both out rather than guessing how they interact. Pink Pastel Albino can still calculate without Albino, including the Pink Panther combination with Anaconda.

Does a result tell me my snake's genetics?

A result is a prediction from the genes you enter. It does not establish what a snake carries, and saving a pairing never changes any animal's recorded genetics.

Sources

• MorphMarket Morphpedia: Albino inheritance
• MorphMarket Morphpedia: Anaconda inheritance
• MorphMarket Morphpedia: Arctic inheritance
• Ectotherm Empire: western hognose morph guide
• Ectotherm Empire: Albino combinations
• Breeder records: Anaconda and Superconda
• Breeders on Red Line and Extreme Red
• MorphMarket community: Pink Pastel Albino and Albino