This tool provides a general estimate and does not replace professional veterinary advice.
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What is the Gecko Morph & Genetics Calculator?
The Gecko Morph & Genetics Calculator predicts possible offspring morphs from parent gecko genetics. Understanding likely outcomes helps breeders set expectations and avoid pairing combinations that could carry unwanted or harmful traits.
Geckos generally live 10-20 years when they are well looked after. They are an insectivore, so their nutritional needs shift with age, size and activity. Gecko care varies hugely by species: terrestrial species need floor space and belly heat, arboreal species need height and humidity. Confirm which species you have before setting temperatures, since requirements differ sharply. The usual suspects for this species are metabolic bone disease, retained shed around toes and eyes, impaction, so any noticeable change is worth following up.
Gecko quick facts
| Measure | Gecko |
|---|---|
| Typical lifespan | 10–20 years |
| Adult weight | 1.1–4.2 oz (30–120 g) |
| Diet | Insectivore |
| Mature at | About 1 years |
| Egg incubation | 45–75 days |
| Clutch size | 1–2 eggs |
| Humidity | 50–70% |
How does the Gecko Morph & Genetics Calculator work?
The prediction uses a simplified model of the most influential genes for the trait in question. Real genetics can involve additional modifier genes not captured here, especially for complex or rare morphs. Use it to know roughly where you stand and what to ask about, not to rule anything in or out on its own.
What affects the result
- The genotype (not just visible appearance) of both parents, which isn't always knowable without testing
- Whether either parent carries a recessive trait that isn't visibly expressed
- Modifier genes not included in this simplified model, which can shift real-world results
- Litter or clutch size: since probabilities describe averages across many offspring, not a single guaranteed outcome
How do you use the Gecko Morph & Genetics Calculator?
- Select the known or suspected traits for each parent
- Review the possible offspring outcomes and their approximate probabilities
- Remember these are probabilities across a hypothetical large litter, not a guarantee for any single offspring
- Consider genetic testing for high-stakes breeding decisions
If two people care for your gecko, agree on one method and stick to it. Half of all confusing results come from measuring differently each time.
For related questions, see the other genetics tools or browse every gecko tool.
Before you rely on this
Averages hide a lot of variation. The figure here reflects what is typical for geckos, but your gecko may sit well outside it for perfectly ordinary reasons. Use the result to spot changes over time in your own animal rather than to compare it against other people's pets.
Sources and references
The formulas, reference ranges and species data behind the Gecko Morph & Genetics Calculator come from these veterinary references, professional bodies and published research.
- PubMed CentralOpen-access biomedical literaturencbi.nlm.nih.gov(opens in a new tab)
- Merck Veterinary ManualReptilesmerckvetmanual.com(opens in a new tab)
- ARAVAssociation of Reptilian and Amphibian Veterinariansarav.org(opens in a new tab)
- Merck Veterinary ManualRoutine Care and Breedingmerckvetmanual.com(opens in a new tab)
- Built on veterinary referencesFormulas and ranges come from veterinary manuals, university research and welfare bodies, listed above for you to check.
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