I understand the calculations for basic genetic combinations but I'm having trouble with some of the more complex pairings. If you know how, can you please post a walk through on how to calculate the expected outcomes of complex pairings - such as:

Pewter x Spider =

12.5% Normal
12.5% Spider
12.5% Pastel
12.5% Cinny
12.5% Bee (Pastel Spider)
12.5% Pewter (Pastel Cinny)
12.5% Cinnabee (Cinny Spider)
12.5% Pewter Bee (Pastel Cinny Spider)

Thanks

Chad