Question

A mother has blood type AB and a father has blood type O and they have a child together. What is the probability that their child will have O blood type like the father? 8. If blood is needed to be given to the mother and AB blood type is not available, what other blood types can the mother receive (not considering Rh factor)? Explain your answer. Explain why a person with AO genotype has the same phenotype (blood type A) as a person with AA genotype.

Answer 1

Ans : Cross

8. The mother can receive all blood types (A, B & O), because the mother is having a blood type AB, which is a universal receipient. AB blood group does not contain antibody A & B , so when blood tramsfusion is done with :

* Blood type A : A blood possess antigen A, but when it is transfused with blood group AB which does not have A antibody , no interaction of antibody -antigen happens, no coagulation /agglutination happens, no generation of immune response occurs & blood can be easily transfused.

* Blood type B : B blood group contains B antigen but AB does not possess B antibody , so no interaction of antigen- antibody , no agglutination, no immune response generation occurs & hence transfusion can be done easily.

* Blood type O : O blood group does not have A & B antigen (only A & B antibodies), AB blood type has no antibody A & B , so no reaction between antigen & antibody, no coagulation, no generation of immune response & hence blood can be transfused easily.

-- Person with AO/A genotype contains two alleles iA i , in which allele iA is dominant over i allele, giving phenotype of A blood group. Similarly , in blood type AA , two alleles iA iA are present , which are completely dominant over each other, giving one phenotype of A blood group.

- i allele is recessive in nature , whereas iA & iB are dominant alleles.

Hope this will help you☺