Is it possible to perform investigation of natural paternity, maternity or brotherhood and sisterhood using the ABO blood typing?

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Muskan Anand

2 years ago

By using the ABO blood typing it is possible only to exclude paternity, maternity or brotherhood/sisterhood but it is not possible to conclude positively about these relationships. For example, if an individual has type O blood, ii genotype, he or she cannot have biological parents of the type AB (IAIB genotype) since necessarily one of his/her alleles has come from the father and the other from the mother. Another example: a couple of individuals of the type O (ii) in their turn can only generate direct offspring of the type O blood, since they do not have alleles that condition antigen A neither antigen B.

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