Multiple choice

Select the true statements regarding the Rh blood system.

  1. It is the first blood system to be discovered by Landsteiner.

  2. It is genetically more complicated than the ABO system.

  3. There are 25 Rh blood types.

  4. It was first discovered in chimpanzee.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Rh system apparently is genetically much more complex since it involves 45 different antigens on the surface of red cells that are controlled by 2 closely linked genes on chromosome 1. In most cases, the ABO system is controlled by only 2 antigens.

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