What every gene name means
Every listing on the Exchange tags its genes. This is the plain-language guide to reading them — what each morph looks like and how it's inherited. It's the basics; the full encyclopedia, combos and het math live in Codex.
How morphs are inherited
Recessive
Needs two copies to show. One copy is a hidden 'het' carrier — visually normal, but it passes the gene on.
Incomplete dominant
Shows with one copy, and shows differently with two (the 'super' form). Commonly — if loosely — called 'co-dom' in the hobby.
Dominant
Shows with one copy and looks the same with two — there's no distinct super form.
Polygenic
Built by selectively breeding many small genes over generations, not a single switch. Results vary by line.
Browse by species
Ball Python
Python regius
The most morph-rich snake in the hobby — hundreds of base genes combine into endless designer combos. These are the foundation genes you'll see named in listings.
Reticulated Python
Malayopython reticulatus
Big, intelligent, and increasingly designer. Alongside colour and pattern genes, retics carry dwarf and super-dwarf localities that cap adult size — a key thing to read before you buy.
Boa Constrictor
Boa constrictor imperator
Hardy New-World boas with a clean, well-understood genetics toolkit. We're still expanding this list.
Corn Snake
Pantherophis guttatus
The classic beginner's morph species — almost everything is simple recessive, which makes the genetics easy to learn. More combos being added.
Western Hognose
Heterodon nasicus
Small, charismatic, and quickly building a morph market of its own. Early days for this list — more on the way.
More species coming
Guides in progress — landing with each Codex release.
Want the full breakdown?
Codex is the complete library — every morph and combo, allelic complexes, het probability math, and the history behind each line.