Question:
Which genotype produces Rh negative phenotype?
Which genotype produces Rh negative phenotype?
Show Hint
Rh− = absence of D antigen expression.
Updated On: Jul 18, 2026
- Ccd
- CdC
- CDE
- CdE
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The Correct Option is D
Solution and Explanation
Step 1: Understanding Rh genotype system.
Rh blood group is controlled by multiple alleles like C, D, and E antigens. Presence of D antigen determines Rh positive.
Step 2: Meaning of Rh negative.
Rh negative condition occurs when D antigen is absent in genotype combination.
Step 3: Role of alleles.
Genotypes lacking dominant D expression produce Rh negative phenotype even if other antigens are present.
Step 4: Evaluation of options.
Among given options, CdE represents absence of effective D expression.
Step 5: Genetic interpretation.
Such combinations fail to produce D antigen on RBC surface.
Step 6: Final conclusion.
Thus, CdE produces Rh negative phenotype.
Rh blood group is controlled by multiple alleles like C, D, and E antigens. Presence of D antigen determines Rh positive.
Step 2: Meaning of Rh negative.
Rh negative condition occurs when D antigen is absent in genotype combination.
Step 3: Role of alleles.
Genotypes lacking dominant D expression produce Rh negative phenotype even if other antigens are present.
Step 4: Evaluation of options.
Among given options, CdE represents absence of effective D expression.
Step 5: Genetic interpretation.
Such combinations fail to produce D antigen on RBC surface.
Step 6: Final conclusion.
Thus, CdE produces Rh negative phenotype.
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