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18. Mother and father of a person with ‘O’ blood group have ‘A’ and ‘B’ blood

group, respectively. What would be the genotype of both mother and

father?

a. Mother is homozygous for ‘A’ blood group and father is

heterozygous for ‘B’

b. Mother is heterozygous for ‘A’ blood group and father is

homozygous for ‘B’

c. Both mother and father are heterozygous for ‘A’ and ‘B’ blood

group, respectively

d. Both mother and father are homozygous for ‘A’ and ‘B’ blood group,

respectively

Solution:

Option (c) is the answer.