Answer:
It is secreted by the pancreas
Explanation:
Insulin is used for negative feedback of blood sugar levels in the blood. It promoted uptake of glucose by cells when the blood sugars are high, especially after a meal. Glucagon hormone, on the other hand, is responsible for the positive feedback.
Basically there are only 2 unique different allele combinations that this organism can produce in their gametes for these traits. They are AB and Ab.