Selvin S
Acta Genet Med Gemellol (Roma). 1977;26(1):81-2. doi: 10.1017/s0001566000010229.
A definition of efficiency is presented to aid a researcher in the choice of the genetic systems for the diagnosis of twin zygosity. An expression is given that produces a numeric value that indicates which systems do the most effective job of discriminating DZ twins from a sample of twin pairs. This definition of efficiency is illustrated with eight blood groups commonly used in twin zygosity diagnosis.