Hognose Snake morph

Incomplete dominant

Arctic

Hognose Snake (Heterodon nasicus)

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What Arctic looks like

One copy of the incomplete dominant Arctic trait. Two copies produce Super Arctic.

An independent incomplete dominant trait. One copy produces Arctic; two copies produce Super Arctic. Arctic often has a lighter background, increased contrast, outlined dorsal blotches and eyebrow markings. Super Arctic has stronger contrast and a reduced head pattern; dark hatchlings typically lighten with successive sheds. Arctic is distinct from the recessive Axanthic and Lavender traits.

How to identify it: Compare contrast, dorsal blotch outlines and eyebrow markings with known parentage. Super Arctic typically develops a pale background with dark blotches. Expression changes with age; appearance alone does not establish the genotype.

How Arctic is inherited

Arctic follows a incomplete dominant inheritance pattern, carried on the Arctic allele (locus ARCT).

Predict Arctic pairingsOpen the Hognose Snake genetics calculator.Identify a Hognose Snake morphUse the morph identifier to match photos to visually identifiable traits.

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