The mother has $\mathrm{A}+$ blood group the father has $\mathrm{B}+$ and the child is $\mathrm{A}+$. What…
The mother has $\mathrm{A}+$ blood group the father has $\mathrm{B}+$ and the child is $\mathrm{A}+$. What can be the possibility of genotypes of all three, respectively?
A. $\quad I^A I^A\left|I^B i\right| I^B i$
B. $\quad I^A I^A\left|I^B i\right| I^A i$
C. $\quad I^B i\left|I^A I^A\right| I^A I^B$
D. $\quad I^A I^A\left|I^B I^B\right| I^A i$
E. $\quad I^A i\left|I^B i\right| I^{A_i}$
Choose the correct answer from the option given below:
C and D
D and A
A and B
B and E
Solution
The child blood group is $\left(\mathrm{A}^*\right)$ that means he must have received ( $i$ ) allele from the father i.e. the father genotype is $\left(I^B I\right)$.
While mother can have $\mu^\mu \mu^\mu$ or $\mu^A$ genotype.
So, the possible genotypes of all three i.e. mother, father and child respectively would be either
(B) $I^A I^A\left|I^B i\right| I^A i$
(E) $I^A i\left|I^B i\right| I^{A_i}$