Quote Originally Posted by RandyRemington
Actually heterozygous is the right word for a pastel and for a spider. Remembering that both have unmatched pairs of genes for their respective mutations (the definition of het) would help you to remember that spider X spider has a chance of producing normals too.
Ok, I just did a quick punnent square, a spider x spider cross would make 75% spiders and 25% normals?

S n
S SS Sn
n Sn nn

Given that, even though there is no "super" manifestation of the spider gene, if you were to somehow figure out which individuals ended up as "SS"(which would be a homozygous spider, right?) as opposed to just "Sn"(a heterozygous spider?), could you breed that individual to a normal and get all heterozygous spiders?