Cornsnake Morph Calculator

Discover the potential offspring from your cornsnake pairing! This calculator helps predict morphs and traits based on simple recessive genetics. For complex interactions (like co-dominant genes or multi-gene epistasis), consult advanced resources.

Enter parental genes below and click “Calculate Offspring”

Parental Genes
Sire’s (Male) Genes:		Format: List visual (homozygous) traits first, then heterozygous traits prefixed with “het”. Example: Snow het Diffused or Amel Anery het Diffused. Separate genes with spaces. Common names like “Snow” (Amel + Anery) will be expanded.
Dam’s (Female) Genes:
This calculator assumes simple Mendelian inheritance for common recessive traits. It does not account for line-bred traits, polygenic traits, co-dominant/incomplete dominant genes (e.g., Masque, Palmetto), or linked genes. Results are statistical probabilities.

Understanding Cornsnake Genetics

Cornsnake morphs are fascinating, arising from variations in their genes. Here’s a quick primer:

• Gene: A unit of heredity passed from parent to offspring. Cornsnakes, like humans, have two copies (alleles) of most genes.
• Recessive Trait: A trait that only appears visually if an individual inherits two copies of the gene responsible for it (homozygous). Examples: Amelanism (Amel), Anerythrism (Anery), Hypomelanism (Hypo).
• Heterozygous (Het): An individual has one copy of the recessive gene and one copy of the “normal” or wild-type gene. They carry the trait but don’t show it visually. For example, “het Amel” means the snake carries Amel but looks normal.
• Homozygous: An individual has two identical copies of a gene. If it’s for a recessive trait (e.g., two Amel genes), they will visually express that trait (e.g., be an Amelanistic snake).
• Morph Name: Often describes the visual appearance. Some morphs are combinations of single recessive traits (e.g., a Snow cornsnake is homozygous for both Amel and Anery).

How Probabilities Work

When two cornsnakes breed, each parent randomly passes one of its two gene copies for each trait to every offspring. For a single recessive trait:

• Het x Het: 25% Visual (homozygous recessive), 50% Het (carrier), 25% Normal (homozygous dominant/wild-type)
• Visual x Het: 50% Visual, 50% Het
• Visual x Normal: 100% Het
• Het x Normal: 50% Het, 50% Normal
• Visual x Visual: 100% Visual

This calculator attempts to combine these probabilities for multiple genes you input.

Further Learning & Resources

Ian’s Vivarium (Morphs) Corn Snake Genetics 101 (HerpNet) Cornsnake.net Genetics