Which book cover is better?

You're great, thank you!

If the father is O negative and the mother O positive can the baby be AB positive?

No. Neither parent of an AB child can be O. There needs to be an A and a B in there somewhere.

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Very unlikely. But there are many possible explanations:(1) You overheard this as gossip. Gossip can be less than perfectly accurate.(2) About 1.2% of the time a blood test is wrong.

With three people involved, that's almost 4%.(3) People can have antigens to the A and B proteins, yet not be AB blood type.(4) Blood type genes can turn on or off or break or repair or be masked by gene expression factors. If this is really important, have a DNA test done. They're a lot more definitive than blood tests.

askville.amazon.com»

But there are many possible explanations:(1) You overheard this as gossip. Gossip can be less than perfectly accurate.(2) About 1.2% of the time a blood test is wrong. With three people involved, that's almost 4%.(3) People can have antigens to the A and B proteins, yet not be AB blood type.(4) Blood type genes can turn on or off or break or repair or be masked by gene expression factors.

If this is really important, have a DNA test done. They're a lot more definitive than blood tests.

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