Recessive ball python gene
Rust Ball Python: Genetics and Pairing Odds
Rust is a recessive gene. A ball python needs two copies to look Rust; with one copy it looks normal and is called het Rust. Pair two hets and about a quarter of the babies are visual Rust, while the normal-looking siblings are each 66% likely to be het. Breed a visual to a normal and every baby is het, which is how most Rust projects start.
In Lock and Lay, Rust can't be bought at the start. It turns up only as a spontaneous mutation, from a lucky egg, and the first breeder to hatch one gets their name on the discovery board.
What Rust pairings produce
| Pairing | Babies, per egg |
|---|---|
| Rust × Normal | 100% Normal het Rust |
| Het Rust × Het Rust | 75% Normal 66% het Rust25% Rust |
| Rust × Het Rust | 50% Normal het Rust50% Rust |
| Rust × Rust | 100% Rust |
| Het Rust × Normal | 100% Normal 50% het Rust |
Try Rust pairings yourself
Put any two animals into the ball python morph calculator for the full odds, hets and supers included. Or breed Rust ball pythons in Lock and Lay, a free ball python game where every clutch follows these same odds and the babies sell on a live market.
Other recessive genes
PuzzleCrypticEnhancerDesert GhostTri-StripeLavender AlbinoGenetic BandedMonarchPiebaldCandySaharaBlack Axanthic