While DCcee (R1r) was the most common Rh phenotype in Caucasians, Dccee (R0r) was the most common in Blacks7. Although differences were noted in the percentage prevalence of Rh phenotypes among Indians and other Asians, the most common phenotype in other Asians was DCCee (R2R2) followed by DCcee (R1r) as in Indians3.
What are the Rh phenotypes?
Common Rh phenotypes
The most common Rh haplotype in Caucasians, Asians, and Native Americans is DCe. In Blacks, the Dce haplotype is slightly more common (1). In Caucasians, the Rh D-negative phenotype results from a deletion of the RHD gene. About 15% of Caucasians are Rh D-negative.
What is the most common Rh?
Rh positive is the most common blood type.
What is the most common Rh POS haplotype in Fisher race nomenclature?
The D antigen is the most immunogenic of the Rh antigens, causing immunization at least 50% of the time when a D-negative person receives a single unit of D-positive blood. Anti-c is the second most important Rh antibody.
What are the two Rh phenotypes?
Your Rh status (positive or negative) is determined by an antigen found on your red blood cells (RBCs). Being Rh-positive or Rh-negative means that either you have the Rhesus D antigen on your RBCs (positive) or you don’t (negative).
Why is O negative so rare?
People with O negative blood often wonder how rare their blood is since it is always in demand by hospitals and blood centers. … Only about 1 in 67 have B negative blood, making it rarer. However, the rarest blood type in the world is Rh-null, which is so rare most of us have never heard of it.
Is this Rh phenotype rare or common?
The Rh phenotypes DCCEE (RzRz), ddCCee (r′r′), ddccEe (r″r), ddccEE (r″r″), ddCcEe (ryr) and ddCcEE (ryr″) were found to be rare in our population with percentage prevalences of 0.002, 0.05, 0.05, 0.004, 0.08 and 0.002, respectively (Table II).