That would be B.
When u have a larger population at hand the chances of your predictions being right are higher. So for example if he predicted a 3:1 ratio(yellow to green peas) he’d have a higher chance of seeing this ratio in a larger population than he would in a smaller one.
It is stored as triglycerides.
The type of mutation seen is germline mutation
Explanation:
BB=Brown as both are big B's
Bb=Brown as there is a big B
bb=Blue as both are little b's