Regarding the ABO blood group system in humans, if an individual is genetically IBi and yet expresses the O blood type, which genotype is he or she likely to have? Hh HH hh iAi iBi none of the above are correct. Hh HH hh iAi iBi none of the above are correct. Solution Ans) Hh Regarding the ABO blood group system in humans, if an individual is genetically IBi and yet expresses the O blood type, which genotype is he or she likely to have Hh..