Аннотация:There are certain types which from the point of view of modern mode of diversity are classified with difficulty. Mainly they have two explanations: it is a mixture, or it is a relict. The Ural race is one of them. For more than 50 years anthropologists can not solve this problem. The author on the basis of his studies of different mixt population thinks that when the population is situated along a gene flow cline (as it is the case of the Ural race), especially if the gene flow is weak it is very difficult if not impossible to solve the "mixt-relic" dilemma. The main reason for this is chance fixation of genes dribbling through the population.