so the spider characteristic is considered dominant because there is no super form of the spider morph. in reality the spider gene is a codominant one because the theoretical clutch odds of a spiderXnormal pairing is 50% spiders and 50% normals.
when breeding a spiderXpastel the odds for a bumblebee to pop out are exactly the same odds as pairing a pastelXpastel and hoping for a super pastel to pop out. which are the same odds as breeding a pair of 100% het animals and having a 25% chance at hatching out the homozygous form of the bred hets.
so by breeding a pastel to spider i have a 25% chance at hatching out a bumblebee right?
Each egg has a 1/4 chance of being a bumblebee, and 1/4 chance of being a spider, a 1/4 chance of being a pastel, and a 1/4 chance of being a normal.