Calculate the blood group

See also: blood group and blood group diet

The tables proposed in this article allow you to quickly calculate the compatibility of a person's blood group with that of their parents.

The first scheme allows us to establish the possible blood group of a child by knowing the blood group of the mother and the presumed father.

To consult the table, find the column corresponding to the blood group of the father and search among the various lines that make up the column relating to the blood group of the mother.

Blood Group of the Father TO B. AB 0 Blood group of the mother TO A or 0 A, B, AB, or 0 A, B, or AB A or 0 The blood group of the child must be: B. A, B, AB or 0 B or 0 A, B, or AB B or 0 AB A, B, or AB A, B, or AB A, B, or AB A or B 0 A or 0 B or 0 A or B 0

For example, if the father's blood type is 0 and the mother's is B, the child will have blood type B or 0.

In some cases (mother with blood group A and father with group B) the ability of the test to establish paternity is very low (the child may have each of the 4 possible blood groups).

The second scheme allows to trace the blood group of the father knowing that of the son and the mother.

To consult the table, look for the column corresponding to the blood group of the child and choose the one that intersects the blood group of the mother from the various lines that make it up.
Some boxes have been blanked out as such combinations are not possible (a child cannot have blood type AB if the mother is a carrier of group 0).

Blood Group of the Son TO B. AB 0 Blood group of the mother TO A, B, AB or 0 B or AB B or AB A, B, or 0 The blood type of the father must be: B. A or AB A, B, AB or 0 A or AB A, B, or 0 AB A, B, AB or 0 A, B, AB or 0 A, B, or AB 0 A or AB B or AB A, B, or 0

PLEASE NOTE: only in some specific cases the blood group test can unequivocally confirm or exclude presumed paternity. Only DNA analysis can therefore provide a 100% safe result. Even if very rarely, genetic mutations can change the rules by which even "impossible" children (eg group A or B from parents 0) can become "possible" ".

These tables might raise some doubts about some specific cases. Some might ask, for example, why two parents carrying blood type A can give birth to a child with blood type A or 0. To answer this question, it is necessary to clarify some basic concepts of Mendelian genetics.

A person's blood group is determined by the presence of two alleles. An allele is an alternative form of a particular gene. For example, a gene that controls the "hair color" trait in an animal can exist in two alleles: the "light hair" allele and the "dark hair" allele.