Can two O blood types make an A?

But it is technically possible for two O-type parents to have a child with A or B blood, and maybe even AB (although this is really unlikely). In fact, a child can get ... This makes it more likely that a small change can cause an O mom to make an A egg (or an O dad to make an A sperm). read more

No, that would be a miracle. The way the AB0 blood type works requires that a person with blood type 0 cannot have any genes coding for A or B, because type 0 is recessive. read more

O blood types present neither A or B antigens on the red blood cell, in order to be type O the individual must have a genotype of OO. If mom is OO and dad is OO then baby can't be A_. The _ is there because the babies blood type can be AO or AA. read more

Blood typing genetic. If you are the biologic child of 2 Blood Type O individuals, you cannot have Type A Blood. Tests are not perfect, however, and you could be misinformed. read more