Question

Study the pedigree chart given below, showing the inheritance pattern of blood group in a family:

Answer the following questions:

1. Give the possible genotypes of individual 1 and 2.
2. Which antigen or antigens will be present on the plasma membranes of the R.B.Cs of individuals ‘5’ and ‘8’?

Answer 1

1. Possible genotypes of individual 1 is I^Bi and for individual 2 it will be I^Ai.
2. Individual 5 - Blood group AB, which gives antigens A and B. 
   Individual 8 - Blood group O, which does not give any antigen.