Different alleles specific completely different phenotypes with totally different medical habits; the molecular characterization of a variant phenotype is way more informative than a serologic description. For example, greater than a hundred and fifty alleles with weak D phenotype are known; for 3 of these, accrued knowledge indicate that allo-anti-D manufacturing is almost inconceivable, whereas different alleles with largely comparable phenotype are known to be associated with allo-anti-D.As…See More