so it is possible that there are homo spiders out there that we just don't know about. Still, we would expect that f1 spider x spider crosses would produce 25% f2 homo spider, 50% het spider, 25% homo normal. Under these circumstances, breeding f2 spider together should give us at least some f3 clutches that are 100% spider. We have been breeding spiders for a long time and no pair of spiders has consistently produced 100% spider litters. This suggests that homo spiders are non existent. It should be noted that the spider gene is either responsible for, or closely linked to a gene that is responsible for a serious neurological defect. It is highly likely that a double dose of this gene make it impossible for a viable snake to form and thrive. It is very likely that homo spider is lethal. Since some f2 litters have more slugs than expected, it is likely that homo spider is lethal at a very early stage.

Making this more likely is the fact that other genes that have the same neurological disorder have been shown to be homozygous lethal. For example, both spider and champagne wobble, and spider champagne in lethal. Champagne wobbles and super champagne is lethal.

In Short, double wobble= dead baby ball python.

David