Reptile species and morph genetics
A free, structured reference to how reptile morphs are inherited — mode by mode, gene by gene, species by species. Built from the same dataset that powers the HerpSync calculator, so nothing here is a claim the product cannot back up.
Species with a curated gene set
These eight species have an established set of named single-gene morphs, documented well enough to be modelled honestly. Each page lists every gene with its mode of inheritance, its super form where it has one, and flags for the two things that break a standard Punnett square — allelic loci and lethal homozygotes.
Ball Python
The most morph-driven species in herpetoculture, with four allelic complexes, two dominant genes that are lethal in their super form, and one sex-linked gene.
Leopard Gecko
Three separate non-allelic albino lines, several distinct snow genes, and a large set of line-bred traits that no Punnett square can predict.
Corn Snake
Almost entirely simple recessive genetics, which makes the corn snake the species most worth learning inheritance on before you spend money.
Crested Gecko
Overwhelmingly line-bred traits, one famous lethal dominant, and a small handful of genes that behave predictably.
Boa Constrictor
Live-bearing, long-lived, and built on co-dominant genes whose super forms are the point of most projects.
Western Hognose
A small, tidy gene set built around one classic co-dominant — Anaconda, whose super form is the Superconda.
Bearded Dragon
A small gene set with one genuine welfare decision built into it — the Silkback, which is the super form of Leatherback.
Gargoyle Gecko
A species where every recorded trait is line-bred — and where an honest tool says so rather than inventing odds.
All 285 supported species
Every species below ships as a preset carrying its own reproductive mode, incubation or gestation length, maturity age, expected clutch or litter size, and the right vocabulary for its young — so a boa produces a litter of neonates and a corn snake a clutch of hatchlings, on every screen.
Species without a curated gene set are fully supported for husbandry, pairings, clutches, pedigrees and sales. What they lack is a published morph dataset, which for most of them is because the hobby does not have one either.
Start with the genetics guides
If you are new to morph genetics, the guides explain the four modes of inheritance, what a het actually is and where 66% comes from, why some morphs can never be combined, and why two of the best-known genes in the hobby are lethal in their super form.
Common questions
How many species does HerpSync support?
HerpSync ships 285 reptile, amphibian and invertebrate species as selectable presets, each with its own reproductive mode, incubation or gestation timing, maturity age and clutch or litter vocabulary. Eight of them additionally carry a curated single-gene morph dataset.
Why do only eight species have a genetics page?
Because those are the species with an established, well-documented set of single-gene morphs. Publishing a page for all of them would mean generating hundreds of near-empty pages, which is thin content that helps nobody. The remaining species are fully supported in the product for husbandry, breeding and record keeping.
Where does the genetics data come from?
It is a hand-authored compilation built in-house from herpetocultural domain knowledge and public scientific sources. Modes of inheritance are genetic facts rather than anyone's property. It is deliberately not scraped from any marketplace.
Can I add a species or a gene that isn't listed?
Yes. A workspace can clone and adjust any species preset, and can contribute its own genes for a project the published dataset does not cover, with the same inheritance settings the curated data uses.
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