Can two people with blood type O have a child with a different blood type?

Generally speaking, two parents with blood type O can only have a child with blood type O. The detailed explanation is as follows:

From the perspective of biological genetics, two individuals with blood type O can only produce a child with blood type O. In the ABO blood group system, there are four blood types: type A, type B, type AB, and type O. The A and B genes are dominant, while the O gene is recessive. When both parents have blood type O, their child can only inherit the O gene from each parent, resulting in blood type O. Specifically, type A blood carries only the A antigen, type B blood carries only the B antigen, type AB blood carries both A and B antigens, and type O blood carries neither antigen. Therefore, no other blood types can result from two O-type parents.

Note: If a child born to two parents with blood type O has a blood type other than O, it is recommended to consult a doctor for further testing.