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Father has o positive blood mother has o positive rhfactor blood child was born with b positive blood how can this be?

2 doctors weighed in
Dr. Steven Neish
Pediatrics - Cardiology
1 doctor agrees

In brief: Blood type genetics

Abo blood type refers to antigens present on red blood cells.
From each parent you inherit an a antigen, a b antigen, or no antigen. People inheriting an a and an a are type a. Inheriting an a from one parent and nothing from the other is also type a. Inheriting an a and a b creates type ab. People who are type o have no antigens. If each parent is type o, the children must be type o.

In brief: Blood type genetics

Abo blood type refers to antigens present on red blood cells.
From each parent you inherit an a antigen, a b antigen, or no antigen. People inheriting an a and an a are type a. Inheriting an a from one parent and nothing from the other is also type a. Inheriting an a and a b creates type ab. People who are type o have no antigens. If each parent is type o, the children must be type o.
Dr. Steven Neish
Dr. Steven Neish
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