Which combination of haplotypes yields the genotype R1r?

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Multiple Choice

Which combination of haplotypes yields the genotype R1r?

Explanation:
The idea being tested is that a person’s Rh genotype comes from two haplotypes, one inherited from each parent. R1 and r are specific Rh haplotypes, so a genotype written as R1r means the two haplotypes present are one corresponding to R1 and one corresponding to r. In this system, the R1 haplotype is DCe, and the r haplotype is ce. Therefore, the genotype R1r is best represented by the combination DCe / ce. This matches the idea of having one chromosome with the DCe pattern and the other with the ce pattern. The other options don’t provide that exact pair of haplotypes, so they wouldn’t correspond to the R1r genotype.

The idea being tested is that a person’s Rh genotype comes from two haplotypes, one inherited from each parent. R1 and r are specific Rh haplotypes, so a genotype written as R1r means the two haplotypes present are one corresponding to R1 and one corresponding to r.

In this system, the R1 haplotype is DCe, and the r haplotype is ce. Therefore, the genotype R1r is best represented by the combination DCe / ce. This matches the idea of having one chromosome with the DCe pattern and the other with the ce pattern.

The other options don’t provide that exact pair of haplotypes, so they wouldn’t correspond to the R1r genotype.

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