many ?

i have 2 bp brother and sister
#1 if they bor sis shouldn't they be the same shad color
#2 male is 120 grams female 149 grams how many should the rats be? right know rats i feed them are 20 to 24 grams
#3should it be a % of the snakes weight?
#4 those of u breed mice and rats do u keep them inside your home or outside?

I'm going to try to interpet your questions, if I misunderstand please let me know.
#1 Normal ball pythons have a WIDE range of colors and patterns, and even ones out of the same clutch can look wildly different.
#2 The prey items should not make a large lump when fed.
#3 I've never heard of a percentage being used for weighing rats for prey size.
#4 all my rodents are kept inside. Gets too hot outside here.

Hope this helped

Siblings don't have to look alike - they may or may not have similarities.

I am not sure about prey size for your snakes, but the mouse/rat should be about as big around as the width as the snake. I am guessing, but IMO, your BP's can probably eat anything from a hopper to a small adult mouse. It's size, not weight that matters.

We don't breed our own rodents, but most people have them in a separate room from the snakes, but still in the house.

Can you share pictures so we can see these siblings?