Question

A person with blood group A produces antibodies against B. A person with blood group B produces antibodies against A. A person with blood group AB produces no antibodies. How can you explain this?
A and B alleles are co-dominant. Therefore, both A and B carbohydrates are present on the cell.
A is incompletely dominant over B. Both A and B carbohydrates are present on the cell.
A and B alleles are co-dominant. Half the cells have only A, and other half have only B.

Answer 1

i think it is A or C

Answer 2

In Co-dominant both the alleless express independently in heterozygote .

Answer 3

so is it C

Answer 4

No , its A both of A and B present at the same time