What blood type will a child have if one parent has type B blood and the other has type O blood?

Apr 07, 2020 Source: Cainiu Health

Dr. Liu Feng

Introduction

In general, children born to parents with blood type B and blood type O may have either blood type B or blood type O. Blood type is determined by antigens on the surface of red blood cells: individuals with blood type B have a genotype of either BB or BO, whereas those with blood type O have a genotype of OO. During inheritance, each parent contributes one allele to the child.

Under normal circumstances, children born to parents with blood type B and blood type O may have either blood type B or blood type O. The detailed analysis is as follows:

Blood type is determined by antigens on the surface of red blood cells. Individuals with blood type B may have a genotype of BB or BO, whereas those with blood type O have a genotype of OO. During inheritance, each parent contributes one allele to the child. If the parent with blood type B has the genotype BB, then regardless of combination with the OO parent, the child’s genotype will always be BO, resulting in blood type B. If the parent with blood type B has the genotype BO and mates with an OO parent, the child’s genotype may be either BO (resulting in blood type B) or OO (resulting in blood type O).

Therefore, children born to a couple where one partner has blood type B and the other has blood type O can only have blood type B or O—blood type A or AB is impossible.

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What blood types do the parents have if their child has type B blood?

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.

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What happens when type A standard serum is mixed with type B blood?

Agglutination occurs when standard type A serum is mixed with type B blood. This agglutination reaction happens because type A serum contains anti-B antibodies, while type B red blood cells have B antigens on their surface. When standard type A serum is mixed with type B blood, the anti-B antibodies in the serum bind to the B antigens on the surface of the type B red blood cells, resulting in clumping or agglutination.