In the mating of R^1r × R^2r genotypes, which offspring is probably not that of the offspring?

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Multiple Choice

In the mating of R^1r × R^2r genotypes, which offspring is probably not that of the offspring?

Explanation:
In this mating, the important idea is that RhCE haplotypes are inherited as blocks. Each parent can pass only one of their two haplotypes. The first parent has the R1r combination, which provides the haplotypes CDe or cde. The second parent has the R2r combination, giving the haplotypes cDE or cde. Combining one haplotype from each parent yields four possible offspring chromosome pairs: CDe/cDE, CDe/cde, cde/cDE, and cde/cde. Among the provided options, the only genotype that cannot arise from these parental haplotypes is CDe/cdE, because none of the parents carries a cdE haplotype to contribute on a single chromosome. Therefore, the match that cannot be produced is the one listing CDe/cdE.

In this mating, the important idea is that RhCE haplotypes are inherited as blocks. Each parent can pass only one of their two haplotypes. The first parent has the R1r combination, which provides the haplotypes CDe or cde. The second parent has the R2r combination, giving the haplotypes cDE or cde.

Combining one haplotype from each parent yields four possible offspring chromosome pairs: CDe/cDE, CDe/cde, cde/cDE, and cde/cde. Among the provided options, the only genotype that cannot arise from these parental haplotypes is CDe/cdE, because none of the parents carries a cdE haplotype to contribute on a single chromosome. Therefore, the match that cannot be produced is the one listing CDe/cdE.

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