Understanding Blood Type Genetics
Human blood type inheritance strictly follows Mendelian genetics. The ABO system is controlled by three alleles: A, B, and O. A and B are dominant, while O is recessive. This calculator helps you visualize how these genes combine to determine a child's blood phenotype.
In addition to the ABO system, the Rh factor is crucial. Rh Positive (+) is dominant, and Rh Negative (-) is recessive. Two Rh-positive parents can still have an Rh-negative child if both carry the recessive gene. Understanding these patterns is essential for pregnancy health and preventing conditions like Rh incompatibility.