Question

20. A child has type A blood. What are ALL the possible blood types of its parents?
Show each cross to prove that it is possible.
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Answer 1

Answer:

Two parents with A blood type can produce a child with either A or O blood types. ... If one parent has A and another has AB, they can either produce a child with A, B or AB blood types. If one parent has A and another has O, they can either produce a child with A or O blood types.