FRACTIONAL POPULATIONS OF BLOOD-GROUPS

We rederive the Castle-Hardy-Weinberg law on the fractional population s of blood groups using a renormalization group approach. The result s hows that the ratios between the four fractional populations of blood groups A, B, AB, and O are fixed and do not change from generation to generation. We also consider a simple case of mutation, where the bloo d group A is divided into A(1) and A(2), and there exists a mutual tra nsformation between the two. It is shown that detailed information abo ut the fractional ratio between the populations can be obtained using the existing data.