Is There a Positive Assortative Mating for the P Blood Group?
Marianne Rasmuson, Jack Valentin · Human Heredity · 1983
A sample of 350 families from paternity cases, analyzed for the P blood group system, was studied in order to confirm a previously found tendency to positive assortative mating. No significant deviations from random mating were found. However, when combined with materials from previously published reports, a significant deviation in favour of matings between likes was obtained.