what are the three possible combinations of the two types of proteins that can be found on a person's red blood cells

identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.