Which of these children's blood type could not be produced by parents with type a and type o blood types? type o type a type ab all of these are possible

I would say type AB because the parents are type A and type O so there is no possible way to conceive a child with Type AB blood if the parents are A and O.

hope this helps let me know if not

d.

explanation:

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."