Whether spider is dominant is still in the air....
As for pairing your female spider with a normal, its just wasted potential. But You can go ahead and do it, even if you paired her with a pastel male, you would still get spiders and normals, but you would also get bumblebees and pastels too.
Good luck and you have about 3 years until she can breed anyway, you may change your mind during that time.![]()