What blood types do the parents have if their child has type B blood?
Oct 18, 2023
Source: Cainiu Health
Dr. Liu Feng
Introduction
Under normal circumstances, if a child has type B blood, one of the parents could be either AB or B type, while the other parent could be any of the four types: AB, A, B, or O. In summary, the possible blood types of parents of a child with type B blood are quite broad. If you wish to determine the exact blood types, it is recommended to visit a reputable hospital for a blood test.
Under normal circumstances, if a child has type B blood, one of the parents may be either AB or B blood type, while the other parent could have any of the following blood types: AB, A, B, or O. The specific analysis is as follows:
In genetics, blood types involve dominant and recessive genes. If a dominant gene is present, the individual will express the corresponding blood type; only when two recessive alleles are inherited (homozygous) will the recessive blood type be expressed. In the ABO blood group system, human blood types are controlled by three genes—A, B, and O—which can combine into genotypes AO, BO, AB, AA, BB, and OO. Among these, A and B are dominant genes, while O is recessive. A child with type B blood must have either the BB or BO genotype. Therefore, one parent may carry the AB or BO genotype (i.e., blood type AB or B), while the other parent's genotype could be AB, AO, BO, or OO—corresponding to blood types AB, A, B, or O.
The possible blood types of parents of a child with type B blood are relatively broad. To accurately determine the specific blood types, it is recommended to visit a qualified hospital for blood testing.
