Is there a calculator?

[WingedWolfPsion]

Spiders might be dominant, but might not be, and we will never know because there are no supers (well, we will never know until they do actual genetic testing). (In a true dominant, the homozygous version would look exactly the same as the het version).
Because of the lack of supers, I would set them up as co-dominant, and figure that all homozygous spiders die--this is probably what is happening. Most likely the eggs never hatch. Statistics would have to be researched to figure out if spider/spider crosses produce fewer live hatchlings on average. But there are no spiders that produce all spider offspring when bred to a normal, so for genetics purposes, it works as a co-dom.

Here's an example:

Say I want to breed a pastel female to a spider male.

It asks how many mutant traits are involved. I answer "2". I have a spider, and a pastel--that's 2 mutant genes.

I set up Gene 1. It's a co-dominant gene--so I check that, and is named "spider", so I type in spider in the box.

I set up the calculator for the male--he's a spider. He's heterozygous, so I check that box.

Then I set up the female.
She doesn't have the spider gene, so I check WT (without trait).

I set up Gene 2. It's a co-dominant gene--so I check that, and is named "pastel", so I type in pastel in the box.

The female's pastel. She's heterozygous, so I check that box.

The male doesn't have the pastel gene, so I check "WT" on his side, by Gene 2.

Then I click the button, and it gives me the percentages.

I get my answer:

25% WT
25% Het. Pastelc,
25% Het. Spiderc,
25% Het. Spiderc, Het. Pastelc,

(The c indicates a co-dominant trait).

25% normals, 25% pastels, 25% spiders, and 25% bumblebees