A clown ball python has a pair of genes made up of two clown genes.

A het clown (AKA 100% probability het clown) BP has a pair of genes made up of a clown gene and a normal gene. A het clown BP looks like a normal BP.

When mating two het clowns, each egg has a 25% chance of hatching out a clown (statistically speaking). There is a 99% probability of hatching at least one clown in 17 eggs, which is approximately 3 clutches. There is no way to be 100% certain of getting any clown babies from this mating. We hope Lady Luck smiles on your efforts and gives a clown in the first clutch.