Hognose calculator

Select Parent Animals

Click in the Parent 1 and Parent 2 fields to choose mutations or combinations.
You can search by name or directly select a combination from the list.
Only select the mutations that the hognose snake actually carries (visual or het).

Calculating the Outcome

Once both parents are selected, the calculator automatically determines the possible genetic outcomes.
In the table, you will see for each combination:

• The probability ratio (e.g., 1/4 (25%)).
• The traits (all possible mutations that may occur).
• The combination name, if a known name exists (such as “Sunburst”, “Candy Cocktail”, etc.).
• Each result displays the traits with a color label:
  Orange = recessive
  Gray = heterozygous
  Yellow = possible heterozygous
  Green = incomplete dominant
  Purple = dominant
  Blue = polygenic

Using the Toggle

With the Merged (50%/66% Possible Het) toggle, you can decide how possible carriers are displayed.
When you turn it on, potential het combinations are summarized as “50% het” or “66% het.”
When you turn it off, all individual genetic variants are displayed in full.

Clear or Start Over

Click Clear to remove all selections and start again.

Sharing a Calculation

With the Share button, a window opens with several options to share the current calculation:

• Share on Facebook - post the calculation as a link on Facebook.
• Share via WhatsApp - send the link directly via WhatsApp.
• Copy URL - copy the link to the clipboard to share it manually via email, messages, or forums.

The shared link always opens the calculator with the same selected mutations and immediately displays the corresponding results.

Combination Names

All combination names shown in the calculator are names commonly used for specific color and pattern combinations. On our collection page, you can find these combination names with explanations and photos of our own animals. For additional examples and detailed descriptions, you can also visit Hognose Morphs.

Tips

• You can also enter combinations using common “combo” names (such as Sunburst or Maitai).
• The label colors in the calculator correspond to the same colors used in the available animals section on our website.
• Use the calculator as a helpful tool - genetics is always a matter of probability, not a guarantee.

Inheritance per gene

Each gene can occur in multiple variants, known as alleles. A hognose snake inherits one allele per gene from each parent and can therefore carry a maximum of two alleles per gene.

• When a hognose snake carries two different alleles, it is heterozygous (abbreviated het). In incomplete dominant genes, this often results in an intermediate expression, an appearance that falls between both variants.
• When a hognose snake carries two identical alleles, it is homozygous. In the case of incomplete dominant genes, this is commonly referred to in the hobby as a super form.

The combination of all present alleles forms the genotype, while the visible result of this genetic makeup is called the phenotype.

Recessive

A recessive gene is only expressed when a hognose snake carries two identical recessive alleles. To produce recessive offspring, both parents must carry the allele, even if they do not show the trait themselves and are only carriers.
Example: Albino

Incomplete dominant

An incomplete dominant gene is visible with one altered allele, but shows a distinctly different expression when two identical alleles are present. Both the heterozygous and homozygous forms therefore have their own characteristic appearance.
Example: one Anaconda allele, two alleles Superconda

Some incompletely dominant genes consist of multiple alleles, variants of the same gene located at the same position in the DNA. When two different alleles are combined, such as Arctic and Antarctic, this results in an intermediate phenotype.
An animal can carry only two alleles per gene. If one of these is Arctic, the other cannot be a second Antarctic allele.
Example: Arctic combined with Antarctic

Dominant

A dominant gene is visible with a single allele and does not change in appearance when two alleles are present. Although the genotype may differ, the phenotype remains the same.
Example: Cinnamon

Polygenic

Some traits are polygenic, meaning they are influenced by multiple genes simultaneously, often in combination with selective breeding. This results in a wide range of variation in color and pattern and does not follow a simple Mendelian inheritance pattern.

Because the exact outcome cannot be predicted, the calculator displays these traits as a possible trait. Polygenic traits can be enhanced through line breeding, where hognose snakes with the most desirable expression are consistently selected.
Example: Lemon Ghost