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Can biological siblings have different blood groups?

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General & Family Physician
Practicing since : 2008
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My two sisters have O+ blood type and I have AB+ Is it possible for us to be biologically related?
Posted Fri, 7 Mar 2014 in Blood Disorders
Answered by Dr. Gaurav Katiyar 1 hour later
Brief Answer: Yes Detailed Answer: Hi, I have gone through your query. Your two sisters have O+ and you have AB+ blood group under ABO blood grouping. Yes, it is possible that all of you are biologically related. From this, it is clear that that Your father and mother have A+ and B+ blood group respectively or vice versa. Hope I have answered your query. If you have any further questions I will be happy to help.
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