Pocket Blood Type Calculator

Pocket Blood Type Calculator is a mobile app designed to help user determine the probability of the blood type of their children if the user knows the blood type of both parents. Pocket Blood Type Calculator also has a feature to determine the possibility of the other parent blood type if the blood type of one of the parent and the children are known.

Blood type is an example of a trait determined by a single gene. Each of us has two copies of the gene for blood type on chromosome pair number 9. One copy is inherited from our mother, the other from our father. There are three versions (called “alleles”) of this gene: A, B, and O. A person’s blood type is determined by which allele he/she inherits from each parent. There are four main groups of blood: A, B, AB and 0. Each of them contains different antigens (such as carbohydrates or proteins) on the membrane of red blood cells. Depending on the presence or absence of these antigens, as well as on the presence of specific antibodies in the blood plasma, it is possible to find out which blood group your blood belongs to.

The blood type is determined genetically - each person inherits it from their parents. As it is controlled by a single gene, each person has two alleles describing their blood group:
- Blood type A: either AA or A0
- Blood type B: either BB or B0
- Blood type AB: alleles AB
- Blood type 0: alleles 00
Alleles A and B are dominant, and the allele 0 is recessive. It means that only people with 00 alleles can have the blood type 0.

All calculations must be re-checked and should not be used alone to guide patient care, nor should they substitute for clinical judgment