The blood type of the father and the child may not be exactly the same, our blood type is determined by laboratory tests. There are two main categories of blood types: 1. one is the ABO blood group system. the ABO blood group refers to what we often call blood type A, B, O and AB, which is a traditional name. The four blood types we refer to are the manifestation of the dominant blood type, a blood type has two parts, the genetic composition can be dominant or recessive.2. The other is the Rh blood group system. And our genetic performance is mainly dominant, the parents each inherit a gene to the child on it. The child’s blood type combination, so that there will be a variety of blood type performance may be, so the father and the child’s blood type is not necessarily the exact same, and there may even be children and parents of both blood types are different, so that does not mean that there is no kinship.