Question

How can a child get O blood group when parents have O and A blood groups(even when O is recessive)??​

Answer 1

Answer:

due to domination

Explanation:

Because A is dominant, that means your mother could carry a hidden O. If she does then when she gets pregnant, each child has a 50% chance of getting her dominant A and a 50% chance of getting her hidden, recessive O. If the child gets the O from mom and an O from dad, he or she will have an O blood type.