Question
Rh factor.

Answer

Rh factor:
  1. Rh factor is the term adapted from Rhesus monkey.
  2. In rhesus monkey, there is antigen D on the surface of their RBCs.
  3. Landsteiner and Wiener discovered this antigen and termed it as Rh factor.
  4. Persons having Rh factor or D antigen are called Rh positive while those lacking D antigen or Rh factor are called Rh negative.

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