Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Abstract: (1592 Views)
This is a report about two sisters whose red cells were grouped as 0, but their father was grouped as AB and their mother was groupe as O. These two sisters were Bombay phenotype it means they were homozygous for and inactive allele (amorph) H. When H is not formed the enzymes determined by A and B genes have no substrate on which to act, so that hh persons can not make the A or B antigen if they have the A or B gene.