A study of some genetic characteristics of the population of the Sudan

300 random blood samples collected from residents of Khartoum, Sudan, were analysed for 5 blood group systems, 4 serum proteins, 9 red cell enzymes, abnormal haemoglobins and beta-thalassaemia. The results suggest varying degrees of admixture of the local tribes by migration from the surrounding regions. Two samples showed a probable new variant of glucose 6-phosphate dehydrogenase (? GdB Khartoum) with normal red cell activity. In spite of the presence of a high degree of consanguinity in the population, there was no significant deviation from Hardy-Weinberg equilibrium in any of the polymorphic systems.