Is this the correct calculation?

[lumpy]

Here it explains that for the morphs we are talking about. And yes, they are allelic so it is wrong.

Corn snake genetics Question

In order for a recessive mutation to be visually apparent, the snake will need two copies of the recessive genes. They get one copy from each parent. Ultra is a hybrid gene. Most corn snake genes are recessive, so in order to get a visually amel snake, there would be two copies of the amel gene sitting at the amel locus. It just so happens that the rat snake gene for ultra also sits at the same place as the amel gene. So if the parent is visually ultramel, it means that there is one gene for ult…