Question

Consider the following statements and choose the appropriate option from given below codes.
I. ABO blood group is an example of dominance, codominance and multiple alleles.
II. ABO is most popular known blood group and is so named O in the group refer to having antibodies a and b.
III. Blood group O with $R{H}^{+}$is regarded as universal donord.

• A. All statements are false.
• B. Al statements are true.
• C. Statement I is true while II and III are false.
• D. Statements II and III are true while I is false.

Answer 1

The correct option is A All statements are false.

Karl Landsteiner in 1900 had devised ABO blood grouping based on the presence of antigen on the surface of RBC. It is an example of dominance, codominance, and multiple alleles. O blood group belongs to those individuals who neither have A antigen nor B antigen. The ABO blood groups can further be divided as Rh positive ( which have Rh antigen ) and Rh-negative ( which do not have Rh antigen ). Blood group O-ve is considered to be the universal donor and AB +ve as universal acceptor. However, these terms are only generally true with respect to the possible interaction of the recipient anti-A and anti-B antibodies to transferred red blood cells.

Hence correct answer is option C.