Pace D P, Saccucci F, Britti F, Casini D
Acta Genet Med Gemellol (Roma). 1976;25:164-6. doi: 10.1017/s0001566000014057.
The distribution of A1A2BO, MN, and Rh-Hr blood groups, of salivary ABH substances, and of natural antibodies, was assessed in a sample of 47 MZ twin pairs. The resulting distribution provides indications as to the level of genetic control over the quantitative expression of these traits.