Clutch sizes all depend on the size of the female. Smaller females produce Smaller clutches, bigger females make well...bigger clutches. I do not think that clutch size is Genetic, but getting really big might, so the offspring may or may not grow faster than others... I am not sure.
As to the spider question, they can, but normally a low white spider will throw more low whites from what I have seen. They may throw spiders with more white than them, but I doubt they will be super high white.