Neurospora loci d and f are located on the same chromosome.The d locus always segregates at M_I,while the e locus segregates at M_II at a frequency of 10%.Assuming complete interference,the expected frequency of parental ditypes in the progeny of a cross d⁺e⁺ $\times$ d e is: A)30%. B)40%. C)45%. D)80%. E)90%.

Question

Quizplus · Accepted Answer

Given that the frequency of recombination between the d and e loci is 10%, and assuming complete interference (which means no double crossovers), the expected frequency of parental ditypes is the sum of the non-recombinant progeny (90%) and zero for double crossovers, since complete interference implies that a crossover in one region of the chromosome inhibits a crossover in an adjacent region. Therefore, the expected frequency of parental ditypes is 90%.

Neurospora Loci D and F Are Located on the Same ×\times×

Neurospora Loci D and F Are Located on the Same $\times$