Question

question 9 1 pts in the abo blood group system, what is/are the possible genotype(s) for a person who has blood type o? bo ao oo ao, bo, and oo

Explanation:

In the ABO blood group system, the O blood type is recessive. The A and B alleles are dominant, while O is recessive. A person with blood type O must have two O alleles (genotype OO) because if they had an A or B allele (like in AO, BO), the dominant allele would express, resulting in blood type A or B respectively. So the only possible genotype for blood type O is OO.

Answer:

C. OO (assuming the options are labeled with letters, with the third option being OO)