As per ABO blood grouping system, the blood group of father is $\mathrm{B}^{+}$, mother is $\mathrm{A}^{+}$…
As per ABO blood grouping system, the blood group of father is $\mathrm{B}^{+}$, mother is $\mathrm{A}^{+}$ and child is $\mathrm{O}^{+}$. Their respective genotype can be
A. $B/B \, A/A \, i/i$
B. $I^{B}/I^{B} \, I^{A}/I^{A} \, ii$
C. $A/B \, i^{A}/i^{B} \, j$
D. $A_{A} / I^{B} / I^{A}i$
E. $il^{B} / i^{A} / I^{A}I^{B}$
Choose the most appropriate answer from the options given below :
B only
C & B only
D & E only
A only
Solution
Genotype of father with blood group $\mathrm{B}^{+}=І^{\mathrm{B}} / / \mathrm{i}^{\mathrm{B}}$
Genotype of mother with blood group $\mathrm{A}^{+}=\mid \mathrm{A}_{\mathrm{A} /\left.\right|^{\mathrm{A}}}$
Genotype of child with blood group $\mathrm{O}^{+}=\mathrm{ii}$
Hence only ' $A$ ' is correct.