Several days of fair weather are probably the result of
A. a warm, dry air mass moving over an area.
B. A huge low pressure system moving over an area.
C. A warm front that has stalled over an area.
D. A cold front that has remained in the area.

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.