MeSH definition : A blood group consisting mainly of the antigens Fy(a) and Fy(b), determined by allelic
genes, the frequency of which varies profoundly in different human groups; amorphic
genes are common.;
A blood group consisting mainly of the antigens Fy(a) and Fy(b), determined by allelic
genes, the frequency of which varies profoundly in different human groups; amorphic
genes are common.