In the ABO system of blood groups, if both antigens are present but no antibody, the blood group of the…

In the ABO system of blood groups, if both antigens are present but no antibody, the blood group of the individual would be:
  1. $\mathrm{B}$
  2. $\mathrm{O}$
  3. $\mathrm{AB}$
  4. $\mathrm{A}$.

Solution

ABO Blood group system \(\begin{array}{|c|c|c|c|}
\hline \begin{array}{c}
\text { Blood } \\
\text { group }
\end{array} & \begin{array}{c}
\text { Antigen(s) } \\
\text { present on } \\
\text { the red blood } \\
\text { cells }
\end{array} & \begin{array}{c}
\text { Antibodies } \\
\text { present } \\
\text { in the } \\
\text { serum }
\end{array} & \begin{array}{c}
\text { Geno- } \\
\text { type(s) }
\end{array} \\
\hline \text { A } & \text { A antigen } & \text { Anti-B } & \begin{array}{c}
\text { AA or } \\
\text { AO }
\end{array} \\
\hline \text { B } & \text { B antigen } & \text { Anti-A } & \begin{array}{c}
\mathrm{BB} \text { or } \\
\text { BO }
\end{array} \\
\hline \mathrm{AB} & \begin{array}{c}
\text { A antigen and } \\
\text { B antigen }
\end{array} & \text { None } & \mathrm{AB} \\
\hline \mathrm{O} & \begin{array}{c}
\text { B antigen }
\end{array} & \begin{array}{c}
\text { Anti-A and } \\
\text { Anti-B }
\end{array} & \mathrm{OO} \\
\hline
\end{array}\) Related Theory The ABO blood types were discovered by Karl Landsteiner in 1901.

Asked in: NEET 2004

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