Quote Originally Posted by Zincubus View Post
Well the wobble is an unwanted defect and most breed them with non Spider gene morphs so at least it's watered down to 50:50 chances but presumably if it's a Spider x Spider the gene is 100% going to be passed onto the offspring !??
A spider ball python (with a spider gene paired to a normal gene) mated to a non-spider ball python is expected to produce 50% spider with wobble and 50% non-spider without wobble. That's not watering down, it's just statistics.

What is a spider x spider?

Is it a spider with two spider genes in the gene pair? If so, then mating it to a normal will produce 100% spider babies (snakes with a spider gene paired with a normal gene).

Or is spider x spider the mating of a spider ball python to a spider ball python (each with a spider gene paired with a normal gene)? Doing a Punnett square for this mating gives the following expected results:
25% normal (with 2 normal genes) -- alive
50% spider with wobble (with a spider gene paired with a normal gene) -- alive
25% appearance unknown, AKA super spider (with a gene pair containing 2 spider genes) -- possibly dead

IMO, when Kevin says spider x spider is fine, he means the second -- spider ball python mated to spider ball python. And it is fine because most of the expected babies hatch out, and those babies are just as healthy as babies from a spider ball python (with one spider gene) mated to a normal.