Your father's blood type is O+ and your mother's blood type is A+, is there a chance that you can become AB?

I NEED TO FIGURE IT OUT... I'M CONFUSED...
Update: me and my siblings are all in AB+ group, but our father is O+ and our mother is A+... i just had the blood typing yesterday in our lab... so confused...
Update 2: me and my siblings are all in AB+ group, but our father is O+ and our mother is A+... i just had the blood typing yesterday in our laboratory class in Anatomy and Physiology... so confused...
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