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What is A 40 year old female patient complains of excessive bleeding. Patient gives a history of road traffic accident 5 hours ago and had a lacerated wound on lower back region. Blood grouping test reveals presence of antigen A and antigen B. This system for blood grouping consists of 3 major allelic genes which are located on: and explain in detail?
→ This system consists of 3 major allelic genes; those are A, B and O.
→ They are located on long arm of chromosome 9.
→ These genes control the synthesis of blood group antigens A and B.
→ Based on the presence or absence of antigen A and antigen B, blood is divided into 4 groups i.e A, B, AB and O.