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NEETZoologyBody Fluids and Circulation

What percentage of humans are Rh positive?

Options

  1. A50%
  2. B60%
  3. C70%
  4. D80%

Correct answer

D. 80%

Step-by-step solution

Explanation : Another antigen, the Rh antigen similar to one present in Rhesus monkeys (hence Rh), is also observed on the surface of RBCs of majority (nearly 80 per cent) of humans . Such individuals are called Rh positive (Rh+ve) and those in whom this antigen is absent are called Rh negative (Rh-ve). An Rh-ve person, if exposed to Rh+ve blood, will form specific antibodies against the Rh antigens. Therefore, Rh group should also be matched before transfusions. A special case of Rh incompatibility (mismatching) h

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