Blood Bank ASCP EXAM| 452 QUESTIONS| WITH COMPLETE SOLUTIONS

Blood Bank ASCP EXAM| 452 QUESTIONS| WITH COMPLETE SOLUTIONS What type of serological testing does the blood bank technologist perform when determining the blood group of a patient? - Answer phenotyping If anti-K reacts 3+ with a donor cell with a genotype KK and 2+ with a Kk cell, the antibody is demonstrating: - Answer Dosage Carla expresses the blood group antigens Fya, Fyb, and Xga. James shows expressions of none of these antigens. What factor(s) may account for the absence of these antigens in James? - Answer Gender and Race. The frequency of Duffy antigens Fya and Fyb varies with race. The Fy(a−b−) phenotype occurs in almost 70% of African Americans and is very rare in whites. The Xga antigen is X-linked and, therefore, expressed more frequently in women (who may inherit the antigen from either parent) than in men. Which of the following statements is true? A. An individual with the BO genotype is homozygous for B antigen B. An individual with the BB genotype is homozygous for B antigen C. An individual with the OO genotype is heterozygous for O antigen D. An individual with the AB phenotype is homozygous for A and B antigens - Answer B. An individual with the BB genotype is homozygous for B antigen Which genotype is heterozygous for C? A. DCe/dce B. DCE/DCE C. Dce/dce D. DCE/dCe - Answer A. DCe/dce Which genotype(s) will give rise to the Bombay phenotype? - Answer The Bombay phenotype will be expressed only when no H substance is present. The Oh type is expressed by the genotype hh. Bombays produce naturally occurring anti-H, and their serum agglutinates group O red cells in addition to red cells from groups A, B, and AB persons. Meiosis in cell division is limited to the ova and sperm producing four gametes containing what complement of DNA? - Answer 1N. Meiosis involves two nuclear divisions in succession resulting in four gametocytes each containing half the number of chromosomes found in somatic cells or 1N. A cell that is not actively dividing is said to be in: - Answer Interphase, The cell is engaged in metabolic activity. Chromosomes are not clearly discerned; however, nucleoli may be visible