Quote Originally Posted by BrandonsBalls View Post
Is it just me, or have they been around long enough that the probability is that there isn't an homozygous spider?
The real issue is the absence of a BP genome map and the genetic tests such a map would allow for. Since there is no documented super form, it's assumed the homozygous and heterozygous forms are visually identical, and thus, a particular animal can only be suspected of being homozygous.

While you can suspect an animal bearing a dominant trait of being homozygous, the only "proving" you can do is when it's shown to be heterozygous by throwing even a single non-spider offspring.