question_answer 50)

  Can a child have blood group '0' if his parents have blood group 'A' and 'B' Explain.

Answer:

                  A child have blood group 0 in the following two cases Case I When father is  and mother is . The offsprings will have the above possible blood groups, i.e., AB, A, B and 0   Case II When father is  and mother is .   The offsprings will have the above possible blood groups, i.e., AB, A, B and 0. Thus, a child can have blood group 'O' if parents have heterozygous alleles for group 'A' and 'B'.