Principles of Inheritance and Variation Question 21
21. A man with blood group ’ $A$ ’ marries a woman with blood group ’ $B$ ‘. What are all the possible blood groups of their offsprings?
[2015 RS]
(a) A,B and AB only
(b) $A, B, AB$ and $O$
(c) O only
(d) A and B only
Show Answer
Answer : b
Hints & Solution
(b) Possible $\quad$ $\times$ $\quad$ Possible
genotype $\qquad\qquad$ genotype
of man with blood $\quad\quad$ of woman with
group $A \qquad\qquad$ blood group $B$
$I^{A} I^{A}, I^{A} i \quad \times \quad I^{B} I^{B}, I^{B} i$
If the genotype is
$I^{A} i \qquad\qquad \times \quad I^{B} i$
The possibility of resultant blood group may be $A, B, AB$ and $O$.
