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4.Principles of Inheritance and Variation
medium
A person with unknown blood group under $ABO$ system, has suffered much blood loss in an accident and needs immediate blood transfusion. His one friend who has a valid certificate of his own blood type, offers for blood donation without delay. What would have been the type of blood group of the donor friend?
A
Type $AB$
B
Type $O$
C
Type $A$
D
Type $B$
Solution
Blood type $'O'$ has no igen but both types of antibodies ' $a$ ' and ' $b$ '. The person with blood type ' $O$ ' is universal donor.
Standard 12
Biology
