Are children with same mother but different fathers full or half brother sisters?
Half your genetic material comes from your father, half from your mother. If your mother and father conceived you, and your brother or sister, that would make you FULL siblings. If your Mum conceived a child with another man, a man not your father, then that child has half your genetic makeup, because his mother is your mother too, but because his father and your father are not the same, he is your HALF brother! Simple as half a pie.
