Quote Originally Posted by stevepoppers View Post
So no one's ever had a spider that only threw spiders? I haven't heard of this lethal gene; I'm looking it up right now.
I am sure someone has at some point done a spider to spider and maybe they have gotten all spiders. That still doesn't mean that it is homozygous. You would need to breed the suspected homozygous to a normal and it should produce all spiders (right?)