What causes the difference of blood groups in human?

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Julian Strobel

Hi Anaam,

I think you need to ask a more precise question...otherwise I need to answer "variations in blood group genes"...and that is probably not what you wanted to hear?

Dharmesh Chandra Sharma

Blood groups are genetically controlled

Anaam Jawad Alabbasy

Thank you Dr. Dharmesh for your interesting..

@ Thanks Dr. Julian for your answer..

Thank you very much Dr. Niklas Thilo for your interesting..your answer is very useful and interest..