spider bred to a normal give a 50%-50% chance of spider baby's. Because it only takes one copy of the gene to produce the morph and the parent only has one copy(heterogeneous). How ever breed spider to spider and get all spiders. And in theory one of the offspring from a spider to spider breeding would carry's two copies(homogeneous) of the gene so it bred to a normal would produce all spider offspring like a super pastel bred to a normal would produce all pastels.
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