Body Fluids and CirculationMedium
Question
For a person with blood group 'O', which of the following is not a possible combination of parents' blood group genotypes?
Options
A.Father : $I^{B}i$ and Mother : $I^{B}i$
B.Father : $I^{A}I^{B}$ and Mother : $\ ^{A}\ ^{A}i$
C.Father : $I^{A}i$ and Mother : $I^{B}i$
D.Father : $I^{A}i$ and Mother : $I^{A}i$
Solution
Sol. [Key Concept: Blood-group genetics of group 'O']
When $I^{A}$ and $I^{B}$ are present together they both express their own type of sugars.
This combination of parent blood group are not possible for a person with blood group 'O'.
For a child to have type 'O' blood, both biological parents must carry the recessive 'O' allele and pass it down.
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