question_answer

Three children in a family have blood types O, AB and B respectively. What are the genotypes of their parents?

A)  \[{{I}^{A}}i\]and \[{{I}^{B}}i~~~~~~~~~~\]

B)  \[{{I}^{A}}{{I}^{B}}\]and \[ii\]

C)  \[{{I}^{B}}{{I}^{B}}\]and\[{{A}^{A}}{{I}^{A}}\]

D)  \[{{I}^{A}}{{I}^{A}}\]and \[{{I}^{B}}i\]

Correct Answer: A

Solution :

Genotypes of the parents shall be \[{{\text{I}}^{\text{A}}}\text{i}\] and \[{{\text{I}}^{\text{B}}}\text{i}\text{.}\]Therefore, offsprings produced shall have O, AB and B blood types. It is shown as follows: