Question

Rh factor in man could be connected to species $\ldots\ldots$ of monkey

• A. Macaca radiata
• B. Presbytes rhesus
• C. Macaca rhesus
• D. Macac mulatta

Answer 1

Answer: (C)

Macaca rhesus

Answer 2

A protein named rhesus antigen is present on the surface of red blood corpuscles in many persons. It was discovered in 1940 by Landsteiner and Wiener in the blood of Rhesus monkey, Macaca rhesus hence its name. Depending on the race, 85 to 99 percent of the white population have this rhesus antigen (also called Rh fatcor) and are called Rh positive (Rh). Others who do not have this factor are known as Rh negative (Rh). Rh is dominant to Rh.