500
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
What is C. one parent with heterozygous type A blood, and the other parent with type O blood?