ASCP Immunohematology Exam Questions And Answers Already Passed.

Define dosage - Answer Dosage is defined as an antibody reacting stronger with homozygous cells (such as KK) than with heterozygous cells (Kk) List the antigens that commonly show dosage? - Answer Kell. M. N. S, little s. F.y.a, F.y.b J.k.a, J.k.b. Antigens of the Rh system. Is the Duffy antigens F.y.a and F.y.b more prevalent in African Americans or in whites? - Answer In African Americans. 70% African Americans and it is very rare in whites. What does the term heterozygous mean? - Answer A diploid organism is heterozygous at a gene locus when its cells contain two different alleles of a gene. The cell or organism is called a heterozygote specifically for the allele in question, and therefore, heterozygosity refers to a specific genotype. What distinguishes A1 from A2 blood groups? - Answer An A2 person may form anti-A1, but an A1 person will not form anti-A1. What is the only A.B.O phenotype that is incompatible with O cells. - Answer Bombay. The red cells of Bombay show a negative reaction to anti-H because the cells contain no H substance. A Bombay individual has a phenotype little hh and will type as group O. What antibodies are formed by an Bombay individual? - Answer Anti-A, Anti-B, Anti-H.