17. (04.05 LC) What is artificial selection? (3 points)
The practice of breeding organisms to make them more suited to their environment
The practice of breeding organisms to make them produce more offspring
The practice of breeding organisms with chemical fertilizers and pesticides
The practice of breeding organisms with the most desirable traits to the farmer

4. multiple crosses were made between true-breeding lines of black and yellow labrador retrievers. all the f1 progeny were black. when these progeny were intercrossed, they produced an f2 consisting of 91 black, 39 yellow and 30 chocolate. a. propose an explanation for the inheritance of coat color in labradors. b. propose a biochemical pathway for coat color determination and indicate how the relevant genes control coat coloration.