Mrs. Elliott's Return: "A Class Divided"

I'm not really sure how it is that the 3rd graders and the adult prison employees fell into their discriminatory patterns so quickly when they were informed that it was a "game" or learning experiment. Of course one of the main distinctions was that Mrs. Elliott's entire 3rd grade class knew it was a game; whereas, only the brown eyed participants in the adult workshop were aware of the activity. I found it ironic that there were no people of color in the blue-eyed group. Of course this made my mind instantly go to Mendel and recessive vs. dominant genes.

Why is it that the blue eyes didn't assert themselves during the 20-minutes they were left outside?

Why is it that none of the men asserted themselves against Mrs. Elliot as the female participant did?

How did the African Americans feel as members of the brown eyed (dominant group)? They seemed to relish being part of that group.

In the end, did the prison officials feel the workshop served its intended purpose? I ask because in none of the scenes were there any references to the ways in which they work with minorities in the prison population.