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Corn snake morph calculator

Pantherophis guttatus — Almost the whole corn snake catalogue is recessive, which makes het tracking the entire game. Tessera is the notable dominant, and Terrazzo/Buf-line work is incomplete dominant.

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Sire ♂

2 genes

Amelanistic

Recessive

Anerythristic

Recessive

Dam ♀

2 genes

Amelanistic

Recessive

Anerythristic

Recessive

Clutch odds per egg

4 possible hatchlings · updates live

Left out of the percentages because they are polygenic or line-bred — log them on the animal instead: Bloodred intensity, Reverse Okeetee ring width, Candy cane brightness.

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Questions keepers ask

Are predicted morph percentages guaranteed in a clutch?
No. Each percentage is a probability for an individual egg. A small clutch can differ substantially from the expected ratio.
Can a photograph prove a recessive het?
No. Record documented parentage, breeding evidence or appropriate genetic testing separately from visual appearance. A possible het remains a probability, not a proven carrier.
Can line-bred traits be predicted with a Punnett square?
Not reliably. Line-bred and polygenic traits involve selection and multiple influences; keep their descriptions in animal records rather than treating them as simple single-gene odds.

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