Cappuccino Lilly White Crested Gecko
One animal carrying both genes. Each one is inherited separately, so this combination is made by bringing them together rather than being a gene of its own.
The two genes
How one is made
Both genes have to come together in the same animal. The pairing that does it most directly is Cappuccino × Lilly White, which works out every outcome and its odds.
Worth knowing
Lilly White. Two copies produce an almost entirely white animal, widely reported as failing to thrive and not surviving long. Pairing two Lilly Whites is expected to produce a quarter of the clutch in that form.