In an individual that is dihybrid for completely linked genes, which alleles would you expect in the gametes?
A) only recombinant gametes
B) one parental allele combination occurring more frequently than another
C) one parental allele combination occurring more frequently than another and no recombinant gametes
D) two equally frequent gametes containing only parental allele combinations
E) two equally frequent gametes containing only parental allele combinations and no recombinant gametes

Question

Quizplus · Accepted Answer

In the case of completely linked genes, crossing over does not occur between these genes because they are located very close together on the same chromosome. Therefore, only the original combinations of alleles (parental allele combinations) present in the parent will be found in the gametes, and these will occur at equal frequencies. There will be no recombinant gametes because recombination requires crossing over, which does not happen with completely linked genes.

In an Individual That Is Dihybrid for Completely Linked Genes