Which of the following is genetically dominant in man?

Colour blindness

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Rh positive

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Haemophilia

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Albinism

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Solution

The correct option is B Rh positive
Rh positive is genetically dominant in man. The Rh blood group system (including the Rh factor) is one of 33 current human blood group systems. It is the most important blood group system after ABO. At present, the Rh blood group system consists of 50 defined blood-group antigens, among which the five antigens D, C, c, E and e are the most important. The commonly used terms Rh factor, Rh positive and Rh negative refer to the D antigen only.

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