Which statement best describes the D antigen in Rh genetics?

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Multiple Choice

Which statement best describes the D antigen in Rh genetics?

Explanation:
The D antigen on red blood cells is the most immunogenic part of the Rh system, and its presence defines Rh positive. When D is detected, the individual is labeled Rh positive; when D is absent, the individual is Rh negative. Because the D antigen is expressed by the majority of people across populations, Rh positive is more common. The other statements don’t fit because D antigen is not never present, not restricted to certain races, and Rh status is not described as always being D-negative—Rh negative simply means the D antigen is absent.

The D antigen on red blood cells is the most immunogenic part of the Rh system, and its presence defines Rh positive. When D is detected, the individual is labeled Rh positive; when D is absent, the individual is Rh negative. Because the D antigen is expressed by the majority of people across populations, Rh positive is more common. The other statements don’t fit because D antigen is not never present, not restricted to certain races, and Rh status is not described as always being D-negative—Rh negative simply means the D antigen is absent.

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