在遗传咨询中,有时会遇到这样的亲子鉴定问题,双亲的一方已去世,其血型不清楚,怎样根据孩子和母亲(或父亲)的血型来分析和计算生父(或生母)的可能血型及其概率?本文就这类遗传咨询将给予一些回答。对这类遗传咨询的回答要从四方面入手分析,一是应用已知遗传学的基本规律,如ABO、MN血型的遗传。二是分析清楚系谱关系,尽可能判断出其基因型。三是应用 In genetic counseling, sometimes encountered such a paternity test, one of the parents has died, the blood type is not clear, according to the child and the mother (or father) of the blood type to analyze and calculate the biological father or mother possible blood type and Probability? This article will give some answers to such genetic counseling. The answer to such genetic counseling should be analyzed from four aspects. One is to apply the basic laws of known genetics, such as the inheritance of ABO and MN blood types. The second is to analyze the relationship between pedigree, as far as possible to determine its genotype. Third, application