Who can be the father of this child? mom is blood type b. baby is blood type a. john is type ab, harry is type o, and sam is type b. what is the genotype of the mother in this problem?

i need

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.