Question

Which of these is a dominant factor ?

• A. Rh factors
• B. Haemophilia
• C. Albinism
• D. Colour blindness

Answer 1

Answer: (A)

Rh factor was first of all reported in RBCs of a monkey by Landsteiner and Weiner in $1940$. Person having Rh factor is called and without Rh factor $R{h}^{-}.R{h}^{+}$ is dominant over $R{h}^{-}.$ About $85\%$ of world people are $R{h}^{+}$ and $15\%$ are of $R{h}^{-}.$ Percentage of $R{h}^{+}$ people in India is $97\%$ of the population. $Rh$ factor is found in man and rhesus monkey, it is not reported from other animals.