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

@flvsguyle

Answer 2

c, i think, 90%

Answer 3

i think B....95%

Answer 4

c 97%