Alleles for the a and b blood cell antigens are codominant. the condition where no antigens are present on the blood cells (type o blood) is a recessive trait. which set of parents can most likely produce a child with type o blood? a. one parent with type ab blood, and the other parent with type a blood b. one parent with type ab blood and the other parent with type o blood c. one parent with heterozygous type a blood, and the other parent with type o blood d. one parent with homozygous type a blood, and the other parent with homozygous type b blood a a