That's very interesting. Definitely keep breeding him and keep us posted, I think you may have a homozygous spider on your hands!

Quote Originally Posted by RandyRemington View Post
Yes, very interesting. 20+ years into this project about time we get to the bottom of if spider is co-dominant or dominant.
If there are homozygous spiders, it would still be considered a dominant trait, wouldn't it? Because the heterozygous phenotype would still be the same as the homozygous phenotype if this is an actual homozygous spider that the OP has.