Blood Type Calculator

Blood type inheritance follows Mendelian genetic principles, where one gene is inherited from each parent. The ABO blood group system is controlled by three main genes: A, B, and O. A and B genes are dominant, while O is recessive. Each person receives one gene from each parent to determine their blood type. For example, AA or AO combinations result in type A blood, BB or BO in type B, AB in type AB, and OO in type O. A similar system applies to the Rh factor; Rh positive (+) is dominant and Rh negative (-) is recessive. This calculation shows probabilities based on Mendelian genetics, but rare genetic conditions (such as Bombay blood group) can alter results. A laboratory test is essential for definitive blood type determination. Monitoring Rh-negative mothers during pregnancy for Rh incompatibility is particularly important. Blood type knowledge is critical not only for inheritance but also for blood transfusions, organ donations, and emergency medical situations. Knowing your blood type and donating blood can save lives.