All the following statements are true for the H" secreted into the lumen of the distal nephron except: a)can combine with NH4 b) can combine with HCO3 c)can combine with HPO d) can remains as free H e) is secreted by an H- ATP ase pump​

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.