Misty lost 20 pounds after taking a "fitness for living" college course two years ago and has maintained a recommended body weight by applying what she learned in the course. "fitness for living" is an example of a program.

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.