What will be the possible blood groups in children from parents with $B$ and $AB$ blood groups?

In which of the following phenomena can both dominance and codominance be observed?

$A$ man with blood group $AB$ marries a woman with $O$ blood group. In this situation,

Genes located on homologous chromosomes for the same trait are called.....

If the father has $AB$ blood group and mother has $A$ blood group,then the children born to them will have the following blood groups $EXCEPT$ . . . . . . .

How many of the following genotypes possibly represent normal wings in Drosophila?
$(i)$ $Vg^{+} Vg^{+}$
(ii) $Vg^{+} vg^{ni}$
(iii) $Vg^{+} vg^{no}$
(iv) $Vg^{+} vg^{st}$
$(v)$ $Vg^{+} vg$