Morph Outcome Probability Calculator Guide

The Morph Outcome Probability Calculator uses Punnett square genetics logic to predict offspring outcomes from any reptile pairing.

How to use it:

Select the sire (male) genetic traits including visual morphs and het status

Select the dam (female) genetic traits including visual morphs and het status

Click Calculate to see all possible offspring outcomes with probabilities

Understanding your results:

Each outcome shows the percentage probability for an individual egg

Probabilities are statistical — a clutch of 6 eggs will not always match exact percentages

"Het" means the animal carries one copy of a recessive gene but does not show it visually

"66% possible het" means there is a 2-in-3 chance the animal carries the gene

Common inheritance modes:

Recessive: Requires two copies to be visual (e.g., Clown, Pied, Axanthic)

Co-dominant: One copy shows a phenotype, two copies (super) shows a different form (e.g., Pastel, Fire)

Dominant: One copy shows the full trait, super form looks identical