In Mendel's monohybrid cross,$T$ and $t$ are ......... of each other.

Which of the following is an example of multiple alleles?

If a man with blood group $A$ marries a woman with blood group $AB$,which of the following offspring would indicate that the man is heterozygous for blood group $A$?

How are blood groups in humans controlled?

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

$A$ man with blood group $A$ marries a woman with blood group $AB$. Which type of offspring would indicate that the man is heterozygous for blood group $A$?