Patient's question:
In half a month, my due date will be here, and my child will be born. I really want to know whose blood type the child will follow. My husband and I have different blood types: one is O, and the other is B.What kind of help I need: What blood type will a child have if the parents are O and B?
Doctor's answer:
ABO blood type identification typically only requires two antisera, anti-A and anti-B serum, to classify a population into four blood types. For the sake of genetic inheritance patterns and clinical practices, the blood type of children born to a couple depends on the parents' blood types.The genotype for B-type blood has two variants: B-B and B-i. The genotype for O-type blood has only one variant: i-i, making O-type blood a double recessive gene. During fertilization, genes recombine. A B-B and i-i pair will each contribute one gene, resulting in a B-i combination (since B is dominant and i is recessive, the phenotype will be B-type). A B-i and i-i pair can produce either B-i or i-i (phenotype will be O-type).
In general, if a B-type individual and an O-type individual have a child, there is a 3/4 chance the child will be B-type and a 1/4 chance the child will be O-type. Of course, this is merely a probability issue; if they have only one child, it might just happen to be O-type.