Free Tool
Ball Python Genetics Calculator
Select sire and dam genes. Get offspring probabilities, het odds, and combo names instantly.
Free. No account required.
How it works
Pick your male. Pick your female. Add their genes from a database of 400+ morphs. Whether you call it a morph calculator or genetics calculator, this tool predicts offspring outcomes from any pairing with exact probabilities.
It handles recessive, incomplete dominant, dominant, and combo genes. Het carriers, super forms, and neurological warnings are all built in.
Inheritance types
Every gene in the calculator is classified by inheritance type. The math changes depending on the type.
| Type | Visual | Het Possible | Super Form |
|---|---|---|---|
| Recessive | Both copies needed | Yes | No |
| Incomplete Dominant | One copy | No | Yes (two copies) |
| Dominant | One copy | No | Debated |
Punnett squares vs this
Works for one or two genes. Falls apart with three or more. Does not account for combos, aliases, or neuro flags. Easy to make math errors on multi-gene crosses.
Handles unlimited genes per parent. Auto-detects combos like Bumblebee, Killerbee, and Crypton. Flags neurological risks. Shows het odds as fractions and percentages.
What the results show
Every outcome is listed with its probability. No guessing.
- Visual morph name for each possible offspring
- Het carrier probabilities shown as fractions
- Combo names auto-detected from gene combinations
- Super forms identified when both parents carry inc dom genes
- Neurological warnings for Spider, Champagne, Woma, and others
- Shareable link to send results to buyers or breeding partners
Questions
Common questions
Over 400 morphs including all major recessive, incomplete dominant, and dominant genes. The database includes aliases and slang names so you can search by common nicknames.
Yes. When offspring genes match a known combo, the combo name appears automatically. Pastel + Spider shows as Bumblebee. Clown + Cryptic shows as Crypton. No manual lookup needed.
Certain genes like Spider, Champagne, Hidden Gene Woma, and Woma carry neurological issues (head wobble). The calculator flags these so you can make informed breeding decisions. Single-copy and super-only neuro genes are handled separately.
Yes. Hit the Share button after calculating and you get a direct link with your sire and dam genetics encoded in the URL. Anyone who opens the link sees the same results. No account needed on either end.
It means the offspring has a probability of carrying one copy of a recessive gene without showing it visually. 66% het means two-thirds chance the animal is a carrier. 50% het means one-half chance. The calculator shows these odds for every recessive gene in the pairing.
Stop storing data.
Start using it.
One purchase. Your data. Real insights. Built by a breeder who uses it every day.
$149 Keeper / $379 Breeder. One-time purchase. No subscriptions.