Given Rh antisera reactions showing 4+ for anti-D and 3+ for anti-C, what is the individual's most probable genotype?

Given Rh antisera reactions showing 4+ for anti-D and 3+ for anti-C, what is the individual's most probable genotype?

• A. DCe/DcE
• B. DcE/dce
• C. Dce/dce
• D. DCe/dce

Answer: (D)

The individual exhibiting a 4+ reaction for anti-D indicates a strong expression of the D antigen, suggesting the presence of at least one D allele in their genotype. The reaction of 3+ for anti-C indicates that the individual has some level of expression of the C antigen, which suggests at least one C allele is present. When considering the genotype options, a phenotype that displays strong D (indicated by the 4+ reaction for anti-D) and moderately strong C (indicated by the 3+ reaction for anti-C) aligns with the D and C alleles present in option D, DCe/dce. This genotype contains one allele that expresses the strong D antigen as well as one C antigen, while also having a d allele which does not express D or C. The other options do not accurately represent the 4+ reaction for anti-D and 3+ reaction for anti-C in the same manner. The configuration DCe/dce maintains the required strong expression of D and a lower expression of C that corresponds to the serological reactions observed, making it the most probable genotype for this scenario.

The individual exhibiting a 4+ reaction for anti-D indicates a strong expression of the D antigen, suggesting the presence of at least one D allele in their genotype. The reaction of 3+ for anti-C indicates that the individual has some level of expression of the C antigen, which suggests at least one C allele is present.

When considering the genotype options, a phenotype that displays strong D (indicated by the 4+ reaction for anti-D) and moderately strong C (indicated by the 3+ reaction for anti-C) aligns with the D and C alleles present in option D, DCe/dce. This genotype contains one allele that expresses the strong D antigen as well as one C antigen, while also having a d allele which does not express D or C.

The other options do not accurately represent the 4+ reaction for anti-D and 3+ reaction for anti-C in the same manner. The configuration DCe/dce maintains the required strong expression of D and a lower expression of C that corresponds to the serological reactions observed, making it the most probable genotype for this scenario.