The $ABO$ blood group is controlled by:

As per the $ABO$ blood grouping system,the blood group of the father is $B^{+}$,the mother is $A^{+}$,and the child is $O^{+}$. Their respective genotypes can be:
Choose the most appropriate answer from the options given below:
$A. I^Bi / I^Ai / ii$
$B. I^BI^B / I^AI^A / ii$
$C. I^AI^B / iI^A / I^Bi$
$D. I^Ai / I^Bi / I^Ai$
$E. iI^B / iI^A / I^AI^B$

Some mutations occur at the same locus of a chromosome. They produce ..........

If both parents have blood group $AB$, which blood group cannot be found in their child?

Which of the following characteristics is true for the control of blood groups in humans?

$A$ man with blood group $A$ marries a woman with blood group $B$. What are all the possible blood groups of their offspring?