Molecular studies have shown that most ____ D phenotypes are due to an exchange of genetic information between RHD and RHCE genes.

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Molecular studies have shown that most partial D phenotypes are due to an exchange of genetic information between RHD and RHCE genes. This means that these individuals have some D antigen present on their red blood cells but not the full complement of D antigens. The other options, modified D, null D, and weak D, have different genetic and molecular mechanisms underlying them. Modified D results from single nucleotide changes in the RHD gene that alter the D antigen's structure, null D results from the complete absence of the RHD gene or a deletion of a portion of the gene, and weak D results from the production of an altered or truncated D protein that is not detected by routine serological testing methods.

Molecular Studies Have Shown That Most ____ D Phenotypes Are