My Reptile Atlas
by Ballpark Reptiles
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Ball Python genetics calculator

Pick what each parent carries and see every hatchling the pairing can produce, with the odds for each. Free, no signup, and it covers all 219 proven ball python genes.

Ball pythons have more named morphs than any other reptile, and a lot of them share a locus. Getting a pairing right means knowing which genes are in the same complex, because two of them together make something neither one makes alone.

♂ Male

TRAITS CARRIED
Nothing selected — treated as a normal.
8 BALL COMPLEX
ACID COMPLEX
ALBINO COMPLEX
BLACK EYED LEUCISTIC COMPLEX
BLUE EYED LEUCISTIC COMPLEX
CLOWN COMPLEX
MAHOGANY COMPLEX
SCALELESS COMPLEX
SPIDER COMPLEX
SUPER STRIPE COMPLEX
ULTRAMEL COMPLEX
INCOMPLETE DOMINANT
RECESSIVE
DOMINANT

♀ Female

TRAITS CARRIED
Nothing selected — treated as a normal.
8 BALL COMPLEX
ACID COMPLEX
ALBINO COMPLEX
BLACK EYED LEUCISTIC COMPLEX
BLUE EYED LEUCISTIC COMPLEX
CLOWN COMPLEX
MAHOGANY COMPLEX
SCALELESS COMPLEX
SPIDER COMPLEX
SUPER STRIPE COMPLEX
ULTRAMEL COMPLEX
INCOMPLETE DOMINANT
RECESSIVE
DOMINANT

Predicted offspring

Add traits to one or both parents to see the odds.
Keep the pairing instead of re-typing it

My Reptile Atlas saves this against the two animals, then tracks the clutch through incubation and shows you how the real hatchlings compared to these odds. Free for up to 20 animals.

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What this calculator can and can't tell you

  • Genes in the same complex sit at the same locus, so an animal carries at most two of them. Lesser and Mojave are both in the Blue Eyed Leucistic complex, which is why pairing them gives 25% BluEL and not 25% "Lesser Mojave".
  • Spider, Champagne and Hidden Gene Woma all have lethal supers, and all three carry a wobble that ranges from light to severe. The calculator flags the lethal share; whether to make the pairing at all is a decision no calculator should make for you.
  • Super Black Pastel and Super Cinnamon are recorded with duckbill and occasional kinking, and Super Lesser with bug eyes. Those rows are flagged rather than left looking like any other outcome.
  • Every trait with a known inheritance mode is in the calculator — 219 of the 231 Morphpedia lists. The 12 left out are polygenic, unproven or locality types, where there's nothing to cross rather than something we've chosen to skip.
  • The full list is below, so you can look up what a gene is even when it isn't one the calculator can predict.
Banana is a special case. Banana (and Coral Glow) is sex linked. The odds here for how many hatchlings are banana are right, but the sex of those hatchlings depends on whether the sire came from a male-maker or female-maker line, and no Punnett square over ordinary genes can tell you that.

The genes it covers

Every trait MorphMarket Morphpedia lists as recessive, incomplete dominant or dominant, grouped by how it inherits.

INCOMPLETE DOMINANT
AjaxAlloyAmbushArcaneAridArroyoAstroBaldBambinoBananaBangBladeBongoCafeCalicoCarbonCarnivoreChinoCircleCitronCoffeeCopperDark AngelDark VikingDieselDotEMGEpicExo-lbbFNR VanillaFurrowFusionGaiaGalliumGeneXGHIGlossyGobiGraniteGrimHieroglyphicHigh Intensity ODHigh Orange GeneHydraJaguarJavaJediJolliff TigerJoppaJungle WomaKosmosKRGLaceLC Black MagicMarioMarvelMckenzieMeltMosaicMotleyNannyNicoNr MandarinNyalaOdiumOFYOrange DreamOrbitPantherPastelPeachPhenomenonPixelQuakeRainRARRavenReaperRed GeneRed StripeRhinoSandblastSapphireSatinScramblerShergShrapnelShredderSmugglerSplatterStrikerSurgeTaronjaThe DarklingTrickTridentTrojanTwisterVudooWebWomaWrecking BallX-treme GeneX-tremistZuwadi
RECESSIVE
210 HypoAtomicAxanthic (GCR)Axanthic (Jolliff)Axanthic (MJ)Axanthic (TSK)Axanthic (VPI)BengalBlack AxanthicBlack LaceCaramel AlbinoDesert GhostEnhancerGenetic StripeGhost (Vesper)HypoLavender AlbinoMapleMetal FlakeMigraineMonsoonMorayOrange CrushOrange GhostPatternlessPiebaldPuzzleRainbowSaharaSandstormSunsetTornadoTri-stripeWhitewashZebraPaint
DOMINANT
AdderAHIAshenBlack BellyCongoDesertEramosaFrostGold BlushHarlequinJosieLeopardMordorNovaOriolePinstripeRedheadShatterSplashSunriseTyphoonVesper
ACID COMPLEX — ONE LOCUS, 3 ALLELES
These share a locus, so an animal carries at most two of them and never all three.
AcidConfusionStatic
ALBINO COMPLEX — ONE LOCUS, 2 ALLELES
These share a locus, so an animal carries at most two of them and never all three.
AlbinoCandy
SUPER STRIPE COMPLEX — ONE LOCUS, 5 ALLELES
These share a locus, so an animal carries at most two of them and never all three.
AsphaltGravelSparkSpecterYellow Belly
BLUE EYED LEUCISTIC COMPLEX — ONE LOCUS, 11 ALLELES
Any two of these together make a Blue Eyed Leucistic, and an animal can carry at most two.
BambooButterHet DaddyHoneyLesserMochaMojaveMysticPhantomRussoSpecial
SPIDER COMPLEX — ONE LOCUS, 11 ALLELES
These share a locus, so an animal carries at most two of them and never all three.
Black HeadChampagne · lethal superChocolateCypressHidden Gene Woma · lethal superSaarSableShadowSpider · lethal superSpotnoseWookie
8 BALL COMPLEX — ONE LOCUS, 7 ALLELES
These share a locus, so an animal carries at most two of them and never all three.
Black PastelCinnamonEnchiHet Red AxanthicHuffmanJoltRazor
MAHOGANY COMPLEX — ONE LOCUS, 3 ALLELES
These share a locus, so an animal carries at most two of them and never all three.
CinderMahoganyStranger
CLOWN COMPLEX — ONE LOCUS, 2 ALLELES
These share a locus, so an animal carries at most two of them and never all three.
ClownCryptic
BLACK EYED LEUCISTIC COMPLEX — ONE LOCUS, 7 ALLELES
Any two of these together make a Black Eyed Leucistic, and an animal can carry at most two.
CreedDiscoFireFlameLemonbackSulfurVanilla
SCALELESS COMPLEX — ONE LOCUS, 3 ALLELES
These share a locus, so an animal carries at most two of them and never all three.
MicroscaleScaleless HeadZip Belly
ULTRAMEL COMPLEX — ONE LOCUS, 2 ALLELES
These share a locus, so an animal carries at most two of them and never all three.
MonarchUltramel

Every ball python trait, all 231 of them

The complete list from MorphMarket Morphpedia. A green dot means the calculator crosses it; the rest are mostly rare or single-breeder lines, listed so you can check what a gene is even when we don't predict it.

TraitInheritanceComplexHow common
210 HypoRecessive—Rarest
AcidIncomplete dominantAcidHigher
AdderDominant—Average
AHIDominant—Rarest
AjaxIncomplete dominant—Rarest
AlbinoRecessiveAlbinoCommon
AlloyIncomplete dominant—Rarest
AmbushIncomplete dominant—Rarest
ArcaneIncomplete dominant—Lower
AridIncomplete dominant—Rarest
ArroyoIncomplete dominant—Average
AshenDominant—Rarest
AsphaltIncomplete dominantSuper StripeCommon
AstroIncomplete dominant—Rarest
AtomicRecessive—Rarest
Axanthic (GCR)Recessive—Higher
Axanthic (Jolliff)Recessive—Rarest
Axanthic (MJ)Recessive—Higher
Axanthic (TSK)Recessive—Common
Axanthic (VPI)Recessive—Common
BaldIncomplete dominant—Rarest
BambinoIncomplete dominant—Lower
BambooIncomplete dominantBlue Eyed LeucisticHigher
BananaIncomplete dominant—Common
BangIncomplete dominant—Higher
BengalRecessive—Lower
Black AxanthicRecessive—Higher
Black BellyDominant—Rarest
Black HeadIncomplete dominantSpiderCommon
Black LaceRecessive—Lower
Black PastelIncomplete dominant8 BallCommon
BladeIncomplete dominant—Higher
BongoIncomplete dominant—Higher
Brown BackPolygenic—Rarest
ButterIncomplete dominantBlue Eyed LeucisticCommon
CafeIncomplete dominant—Lower
CalicoIncomplete dominant—Common
CandyRecessiveAlbinoHigher
Caramel AlbinoRecessive—Higher
CarbonIncomplete dominant—Lower
CarnivoreIncomplete dominant—Lower
ChampagneIncomplete dominantSpiderHigher
ChinoIncomplete dominant—Rarest
ChocolateIncomplete dominantSpiderCommon
CinderIncomplete dominantMahoganyAverage
CinnamonIncomplete dominant8 BallRarest
CircleIncomplete dominant—Rarest
CitronIncomplete dominant—Lower
ClownRecessiveClownCommon
CoffeeIncomplete dominant—Rarest
ConfusionDominantAcidHigher
CongoDominant—Rarest
CopperIncomplete dominant—Lower
CreedIncomplete dominantBlack Eyed LeucisticRarest
CrypticRecessiveClownCommon
CypressIncomplete dominantSpiderCommon
Dark AngelIncomplete dominant—Rarest
Dark VikingIncomplete dominant—Rarest
DesertDominant—Rarest
Desert GhostRecessive—Common
DieselIncomplete dominant—Rarest
DinkerOther—Higher
DiscoIncomplete dominantBlack Eyed LeucisticHigher
DotIncomplete dominant—Rarest
EMGIncomplete dominant—Rarest
EnchiIncomplete dominant8 BallCommon
EnhancerRecessive—Higher
EpicIncomplete dominant—Rarest
EramosaDominant—Average
Exo-lbbIncomplete dominant—Rarest
FaderPolygenic—Lower
FireIncomplete dominantBlack Eyed LeucisticCommon
FlameIncomplete dominantBlack Eyed LeucisticAverage
FNR VanillaIncomplete dominant—Rarest
FrostDominant—Rarest
FurrowIncomplete dominant—Average
FusionIncomplete dominant—Lower
GaiaIncomplete dominant—Lower
GalliumIncomplete dominant—Rarest
Genetic Black BackPolygenic—Rarest
Genetic ReducedPolygenic—Rarest
Genetic StripeRecessive—Common
GeneXIncomplete dominant—Higher
GHIIncomplete dominant—Common
Ghost (Vesper)Recessive—Lower
GlossyIncomplete dominant—Rarest
GobiIncomplete dominant—Rarest
Gold BlushDominant—Lower
GraniteIncomplete dominant—Higher
GravelIncomplete dominantSuper StripeCommon
GrimIncomplete dominant—Higher
HarlequinDominant—Rarest
Het DaddyDominantBlue Eyed LeucisticLower
Het Red AxanthicIncomplete dominant8 BallRarest
Hidden Gene WomaIncomplete dominantSpiderHigher
HieroglyphicIncomplete dominant—Rarest
High Intensity ODIncomplete dominant—Higher
High Orange GeneIncomplete dominant—Rarest
HoneyIncomplete dominantBlue Eyed LeucisticAverage
HuffmanIncomplete dominant8 BallAverage
HybridOther—Lower
HydraIncomplete dominant—Lower
HypoRecessive—Rarest
JaguarIncomplete dominant—Higher
JavaIncomplete dominant—Lower
JediIncomplete dominant—Average
Jolliff TigerIncomplete dominant—Lower
JoltIncomplete dominant8 BallLower
JoppaIncomplete dominant—Lower
JosieDominant—Rarest
Jungle WomaIncomplete dominant—Average
KosmosIncomplete dominant—Average
KRGIncomplete dominant—Lower
LaceIncomplete dominant—Common
Lavender AlbinoRecessive—Common
LC Black MagicIncomplete dominant—Lower
LemonbackIncomplete dominantBlack Eyed LeucisticLower
LeopardDominant—Rarest
LesserIncomplete dominantBlue Eyed LeucisticRarest
MahoganyIncomplete dominantMahoganyCommon
MapleRecessive—Lower
MarioIncomplete dominant—Average
MarvelIncomplete dominant—Average
MckenzieIncomplete dominant—Average
MeltIncomplete dominant—Rarest
Metal FlakeRecessive—Average
MicroscaleIncomplete dominantScalelessRarest
MigraineRecessive—Lower
MochaIncomplete dominantBlue Eyed LeucisticAverage
MojaveIncomplete dominantBlue Eyed LeucisticCommon
MonarchRecessiveUltramelHigher
MonsoonRecessive—Common
MorayRecessive—Lower
MordorDominant—Rarest
MosaicIncomplete dominant—Rarest
MotleyIncomplete dominant—Rarest
MysticIncomplete dominantBlue Eyed LeucisticHigher
NannyIncomplete dominant—Average
NicoIncomplete dominant—Average
NormalOther—Higher
NovaDominant—Rarest
Nr MandarinIncomplete dominant—Higher
NyalaIncomplete dominant—Average
OdiumIncomplete dominant—Average
OFYIncomplete dominant—Rarest
Orange CrushRecessive—Average
Orange DreamIncomplete dominant—Common
Orange GhostRecessive—Higher
OrbitIncomplete dominant—Lower
OrioleDominant—Rarest
PaintRecessivePaintCommon
PantherIncomplete dominant—Lower
ParadoxOther—Higher
PastelIncomplete dominant—Common
PatternlessRecessive—Rarest
PeachIncomplete dominant—Average
PhantomIncomplete dominantBlue Eyed LeucisticHigher
PhenomenonIncomplete dominant—Rarest
PiebaldRecessive—Common
PinstripeDominant—Rarest
PixelIncomplete dominant—Average
PuzzleRecessive—Common
QuakeIncomplete dominant—Lower
RainIncomplete dominant—Lower
RainbowRecessive—Higher
RARIncomplete dominant—Rarest
RavenIncomplete dominant—Lower
RazorIncomplete dominant8 BallAverage
ReaperIncomplete dominant—Rarest
RECOOther—Rarest
Red GeneIncomplete dominant—Higher
Red StripeIncomplete dominant—Common
RedheadDominant—Higher
RhinoIncomplete dominant—Rarest
RingerOther—Average
Ringer MarkOther—Rarest
RussoIncomplete dominantBlue Eyed LeucisticHigher
SaarIncomplete dominantSpiderRarest
SableIncomplete dominantSpiderAverage
SaharaRecessive—Rarest
SandblastIncomplete dominant—Higher
SandstormRecessive—Rarest
SapphireIncomplete dominant—Lower
SatinIncomplete dominant—Rarest
Scaleless HeadIncomplete dominantScalelessHigher
ScramblerIncomplete dominant—Higher
ShadowIncomplete dominantSpiderRarest
ShatterDominant—Lower
ShergIncomplete dominant—Rarest
ShrapnelIncomplete dominant—Average
ShredderIncomplete dominant—Lower
SmugglerIncomplete dominant—Average
SparkIncomplete dominantSuper StripeHigher
SpecialIncomplete dominantBlue Eyed LeucisticCommon
SpecterIncomplete dominantSuper StripeHigher
SpiderIncomplete dominantSpiderCommon
SplashDominant—Rarest
SplatterIncomplete dominant—Rarest
SpotnoseIncomplete dominantSpiderCommon
StaticDominantAcidLower
StrangerIncomplete dominantMahoganyCommon
StrikerIncomplete dominant—Lower
SulfurIncomplete dominantBlack Eyed LeucisticAverage
SunriseDominant—Rarest
SunsetRecessive—Common
SurgeIncomplete dominant—Rarest
TaronjaIncomplete dominant—Rarest
The DarklingIncomplete dominant—Rarest
TornadoRecessive—Rarest
Tri-stripeRecessive—Higher
TrickIncomplete dominant—Higher
TridentIncomplete dominant—Lower
TrojanIncomplete dominant—Average
TwisterIncomplete dominant—Average
TyphoonDominant—Rarest
UltramelRecessiveUltramelCommon
VanillaIncomplete dominantBlack Eyed LeucisticCommon
VesperDominant—Rarest
VoltaLocality—Lower
VudooIncomplete dominant—Average
WebIncomplete dominant—Rarest
WhitewashRecessive—Rarest
WomaIncomplete dominant—Average
WookieIncomplete dominantSpiderHigher
Wrecking BallIncomplete dominant—Rarest
X-treme GeneIncomplete dominant—Average
X-tremistIncomplete dominant—Average
Yellow BellyIncomplete dominantSuper StripeCommon
ZebraRecessive—Higher
Zip BellyDominantScalelessRarest
ZuwadiIncomplete dominant—Rarest