What is the most common Rh phenotype found in African Americans?

Prepare for the AAB Medical Technologist (MT) Generalist Exam with flashcards and multiple choice questions. Each question includes hints and explanations to boost your understanding. Get exam-ready now!

The most common Rh phenotype found in African Americans is Dce/dce. This phenotype represents a combination of alleles in the Rh system where "D" is the most significant determinant of the Rh factor. The phenotype Dce/dce indicates that an individual inherits one D allele from one parent and a d allele from the other, along with other minor alleles that contribute to this phenotype.

In the context of the African American population, a higher frequency of the Dce/dce phenotype reflects the genetic diversity and the prevalence of specific Rh alleles in this demographic. The presence of this phenotype is important for blood transfusions and pregnancy management, as it influences Rh compatibility.

The other phenotypes listed, while part of the broader Rh system, do not occur with the same frequency in African Americans. CDe/CDe, R1R1, and r″r represent different configurations of Rh antigens, but they do not match the commonality of the Dce/dce phenotype in this population. Understanding these genetic variations is crucial for healthcare providers to ensure safe blood transfusion practices and maternal-fetal care.

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