Corn Snake Genetic Calculator

Enter two parent morphs to be paired in breeding and calculator will display genetic possibilities.

Use Select Mode

Using the Calculator

Enter in one or more traits for each parents and click the calculate button. There are two ways you can enter traits:
  • Typeahead (default): type the first few characters and options will display which can be selected with a click, enter or tab. Generally faster to use.
  • Select: shows a popup menu of traits. Select one or more. Might be better if you don't like to type at all and/or would like to scroll through all available traits. Control-click (or command-click) to select multiple with keyboard.

Please report missing genes or other errors.

Basic Corn Snake Genetics

Children inherit genes from their parents that give them varied physical appearance, such as color and pattern mutations. For each gene a parent carries, it has a 50% chance of passing it down to its baby. Thus, the offspring receives zero, a single (heterozygous aka "het"), or a pair (homozygous aka "super") of each of the genes based its parents genetics and chance.

Some genes are codominant or dominant and are visible even if only a single gene is carried. A single parent can produce this type of offspring. Other genes are recessive, and only affect visible appearance if the full pair is carried. To breed offspring with visible recessive traits, both parents must possess at least one copy (aka be "het") of this gene. Note that the calculator also includes other traits like line-bred and polygenic traits, but being less understood, these are indicated in offspring with the possible form.

Co/Dominant Genes Normal Super
Recessive Genes Possible Het Het Visual
Other Traits Possible Normal
You can browse all of the morphs for sale using the gene index. There and elsewhere throughout MorphMarket, these genetic traits are color-coded by these characteristics.

In reality, this is all a huge simplification of how genetics actually work, but this is the model that has been found useful by the reptile community. For more read this basic intro and overview of complexes.

PROTIP: You can access the calculator from any page, by putting two morph names in the search box (in the top menu bar) separated by an 'x' and click 'Submit'.
Accessing the calculator from main search window
This is an example. Use the search box at top of the screen.