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Ball Python Morph Calculator

Pick the parents. See the morphs, carrier chances and sourced health notes for each egg.

Parent 1

Separate genes with commas. Use .2 for two copies and .p66 for a 66% possible het.

Normal (no genes added)

Parent 2

Separate genes with commas. Use .2 for two copies and .p66 for a 66% possible het.

Normal (no genes added)

The possibilities

Per egg at conception, for the parent genotypes and assumptions below.

Covers: Caramel Albino, Hypo
Example Caramel Albino
Example image of Caramel Albino
3/16about 18.8%

Caramel Albino

possible het Hypo 2/3 (of the babies that look Caramel Albino)

2 genotypes with this look
  • Caramel Albino het Hypo · 1/8
  • Caramel Albino · 1/16
Health · reported

Visual Caramel Albinos are reported by several breeders to produce kinked babies; no line is known to be free of kinking.

Applies to Caramel Albino het Hypo, Caramel Albino

Sources

Fertility · reported

Visual Caramel Albino females are reported to have high rates of infertile eggs. (in females)

Applies to Caramel Albino het Hypo, Caramel Albino

Sources

Health · reported

Albino-type snakes lack eye pigment and are reported to be sensitive to bright light.

Applies to Caramel Albino het Hypo, Caramel Albino

Sources

Example Hypo
Example image of Hypo
3/16about 18.8%

Hypo

possible het Caramel Albino 2/3 (of the babies that look Hypo)

2 genotypes with this look
  • het Caramel Albino Hypo · 1/8
  • Hypo · 1/16
Example Caramel Glow
Example image of Caramel Glow
1/16about 6.3%

Caramel Glow

Health · reported

Visual Caramel Albinos are reported by several breeders to produce kinked babies; no line is known to be free of kinking.

Applies to Caramel Albino Hypo

Sources

Fertility · reported

Visual Caramel Albino females are reported to have high rates of infertile eggs. (in females)

Applies to Caramel Albino Hypo

Sources

Health · reported

Albino-type snakes lack eye pigment and are reported to be sensitive to bright light.

Applies to Caramel Albino Hypo

Sources

Names follow our reviewed naming rules; breeders sometimes use other names for the same combination. Health notes cover only reported, sourced problems; no result is a health promise.

Keep this pairing

Pick the genes for each parent, or use your own ball pythons, and the calculator lists every baby the pairing can produce as an exact fraction per egg. It names the combinations our references agree on, shows het odds for babies that look normal, and flags reported health problems with their sources. When the genetics are not settled, it says so instead of guessing.

How ball python genes pass to the babies

A few rules explain almost every clutch.

What the calculator will not guess

These are left out of the odds, with the reason shown.

Frequently asked questions

How does a ball python morph calculator work?

Each parent passes one copy of every gene to each baby, chosen at random. The calculator lists every combination of copies the two parents can pass, adds up the chances, and names each result using reviewed naming rules. The odds are per egg, so a real clutch can come out differently.

What does 66% possible het mean?

When two hets are paired, two out of three of the normal-looking babies carry the gene, so breeders call each normal-looking baby a 66% possible het. If you enter a possible het based on pedigree odds, the calculator uses the figure you give as stated. If the figure comes from elsewhere, it shows both outcomes side by side instead of averaging them.

Why does the calculator leave out Banana?

Banana sits on the sex chromosomes in a way that is not fully settled, so a male Banana tends to pass it mostly to sons or mostly to daughters depending on which parent he got it from. Predicting that needs the baby's sex and the father's history, which this version does not model, so Banana is listed as not included rather than guessed.

Can two normal-looking ball pythons produce an albino?

Yes, if both carry one hidden copy of albino. Each egg then has a 1 in 4 chance of being albino, a 1 in 2 chance of being a het like the parents, and a 1 in 4 chance of carrying no albino at all.

Why are some Spider and Champagne pairings flagged?

Spider, Champagne and several related genes are linked to a neurological wobble, and two copies of Spider or Champagne are reported to be lethal. The calculator still shows those babies at conception, with the warning and its source, because leaving them out would make the other odds look better than they are.

Does a result tell me my snake's genetics?

No. A result is a prediction from the genes you enter. Saving it never changes any animal's recorded genetics, and only breeding results or a test can confirm what a snake carries.

Sources