by 
GinnyLynn
ANSWERS: 9
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I suppose you are talking about blood type....and NOPE, if you are O- and your boyfriend is O+ and your daugther is A+, than sorry to say, but your boyfriend is NOT the biological father of your daugther!
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If your boyfriend isn't the father, sure.
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O is the most recessive of all blood types meaning you and your boyfriend both have two reccessive genes of it. in order to have A blood she would have to have a parent with A blood because A is the dominant gene over O
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Sure she can. You are O-. Your boyfriend is O+. Your daughter is A+. Your daughter's father is .... ??? And I'm guessing that's a question mark for who as well as blood type.
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the blood type very often reveals (completly by accident) that the assumed father is not. 0 is the rareest, AB is the most common...but the rules have no compromise in childs type. if she is a+ then your boyfreind (with his type being o-) is not the father, sorry.
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Only if your boyfriend is not the father, which he definitely isn't if your daughter is A+. The rhesus factor (the +/- bit) isn't an issue, but the ABO bloodtype is. There is absolutely no chance that two O-type people could produce an A-type child. Time to 'fess up!
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No impossible because o strian havse no antigens while A has antigens for B strain the father here must be A,B or AB the mothe could be also at any type or the oppesit if explenation needs tel me please !
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Simple terminology as possible NO.
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Look here: http://www.biology.arizona.edu/human_bio/problem_sets/blood_types/btcalcA_popup.html
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