title: A note on the likelihood equation in the ABO blood group system.
abstract: Some sufficient conditions on the data for the likelihood equation of the ABO blood-group system to have a unique solution, the maximum-likelihood estimate, are given. The simplest of these conditions is that the frequency of the blood group O in the sample shall exceed 1/8. This condition will hold for most samples.
mesh_terms: D000017:ABO Blood-Group System; D005787:Gene Frequency; D005838:Genotype; D006801:Humans; D008433:Mathematics
chemical_list: D000017:ABO Blood-Group System