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Message: <blockquote data-quote="Sonique" data-source="post: 12947902" data-attributes="member: 55225">Basically you can have blood type O (this is recessive, which means that if it's paired with an A or a B, your blood type cannot be O), B, A or AB. You will have 2 genes passed on from you parents which will determine which one you are. The possible combinations that will give you a specific type are:O - both genes will have to be O (i.e. OO)B - either BB or OBA - either AA or OAAB - AB onlyYou will receive 1 gene from your dad and one from your mum. You will pass only 1 of you pair to the child, and your parner will pass 1.With negative and positive, they also go in pairs (one from mum and one from dad) and negative is recessive. The following combinations are possible:-- negative-+ positive (as negative is recessive)+- positive++ positiveThe above will mean that your genes are definitely OO and -- .For instance my mum knows she's A positive, I'm B negative. From our groups I can determine that she has passed on an O and a - to me (not an A as I'm B, and not a + as I'm -) so her genes would be AO -+ making her an A positive but still being possible for her to pass on genes that will mean I'm a different blood type to her. This mean my genes are OB -- resulting in me being B negative. Therefore my mum gave me O and - and my dad gave me B and - (sorry if it's confusing :s).<a href="http://sawaal.ibibo.com/health/necessary-that-blood-groups-parents-carry-their-children-461115.html" target="_blank">http://sawaal.ibibo.com/health/necessary-that-blood-groups-parents-carry-their-children-461115.html</a></blockquote>

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