question_answer

The genotypes of a Husband and Wife are \[{{|}^{A}}{{|}^{B}}\]and\[{{|}^{A}}|.\] Among the blood types of their children, how many different genotypes and phenotypes are possible?                                                                               

A)  4 genotypes ; 4 phenotypes

B)  3 genotypes ; 3 phenotypes

C)   3 genotypes ; 4 phenotypes

D)   4 genotypes ; 3 phenotypes

Correct Answer: D

Solution :

                 \[\underset{{{\text{I}}^{\text{A}}}{{\text{I}}^{\text{B}}}}{\mathop{\text{Husband}}}\,\,\text{ }\!\!\times\!\!\text{ }\underset{{{\text{I}}^{\text{A}}}\text{i}}{\mathop{\text{Wife}}}\,\]        Number of genotypes = 4 Number of phenotypes = 3 \[{{|}^{A}}{{|}^{A}}\]and \[{{|}^{A}}i=A\] \[{{|}^{A}}{{|}^{B}}=AB\] \[{{|}^{B}}i=B\]