What blood type will a child have if one parent has type B and the other has type O?
Oct 13, 2023
Source: Cainiu Health
Dr. Li Yanchen
Introduction
Under normal circumstances, children born to a parent with blood type B and a parent with blood type O will have either blood type B or O. The inheritance of the human ABO blood group system is controlled by three alleles—A, B, and O—located on chromosome 9, which directly determine the type of antigens present on the red blood cell membrane. These three genes can form six possible genotypes. Since the A and B genes are dominant alleles,
Under normal circumstances, children born to a parent with type B blood and a parent with type O blood will usually have either type B or type O blood. The specific analysis is as follows:
The inheritance of the human ABO blood group system is controlled by three alleles—A, B, and O—located on chromosome 9. These alleles directly determine the type of antigens present on the surface of red blood cells and can combine into six possible genotypes. Since the A and B genes are dominant and the O gene is recessive, there are only four possible blood phenotypes: type A, type B, type AB, and type O. Type O blood lacks both A and B antigens. Both type B and type O blood lack the A antigen; therefore, children born to one parent with type B and one with type O blood will typically have either type B or type O blood, and generally will not have type A or type AB blood.
In summary, children born to a parent with type B blood and a parent with type O blood are usually either type B or type O. Although blood type normally remains constant throughout life, it may change following hematopoietic stem cell transplantation.
