Alex, are you serious here? I would say that the answer is 2/3. You have three pancakes; B/b, G/b or G/g. You draw a pancake and see a brown side. You can thus either see:
- the b side of the G/b pancake;
- the b side of the B/b pancake; or
- the B side of the B/b pancake.

Thus, there is a 2/3 chance that you drew the B/b pancake and are looking at one of its sides.

Whymme