A spider is a dominant morph, which means that it's super form looks like it's regular form. Co-Dom and Dominant morphs typically are not referred to as hets. When you breed a spider to a normal you should get 50% Spiders and 50% Normals. If you have a homozygous spider you should have a clutch of 100% spiders. Dominant morphs will be the same visually in both het and homo forms. A good explanation is here..http://ballpython.ca/what_get/dominant.html

So pretty much whatever in your clutch doesnt look like a spider is just a normal.