Lock & Lay

Recessive ball python gene

Monsoon Ball Python: Genetics and Pairing Odds

Monsoon is a recessive gene. A ball python needs two copies to look Monsoon; with one copy it looks normal and is called het Monsoon. Pair two hets and about a quarter of the babies are visual Monsoon, 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 Monsoon projects start.

In Lock and Lay, Monsoon 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 Monsoon pairings produce

PairingBabies, per egg
Monsoon × Normal100% Normal het Monsoon
Het Monsoon × Het Monsoon75% Normal 66% het Monsoon25% Monsoon
Monsoon × Het Monsoon50% Normal het Monsoon50% Monsoon
Monsoon × Monsoon100% Monsoon
Het Monsoon × Normal100% Normal 50% het Monsoon

Try Monsoon pairings yourself

Put any two animals into the ball python morph calculator for the full odds, hets and supers included. Or breed Monsoon 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.

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Other recessive genes

PuzzleCrypticEnhancerDesert GhostTri-StripeLavender AlbinoGenetic BandedMonarchPiebaldCandySaharaBlack Axanthic