AS everyone else has explained and to make it easier is that when you breed a super pastel to normal you get all pastels and no supers. So when a spiders bred to super all would express just pastel not super and then some would be spider as well. So pastel is the heterozygous form of the homozygous super pastel and both parents have to be the heterozygous form to produce the homozygous super. Hope this helps a little.