Recombination frequencies near 50% suggest that
A)two genes are on different chromosomes.
B)two genes lie very close together on the same chromosome.
C)two genes are on the same chromosome but lie very far apart.
D)two genes are on different chromosomes, or two genes are on the same chromosome but lie very far apart.
E)none of the choices are correct.

Question

Quizplus · Accepted Answer

Recombination frequency is a measure of the distance between two genes. If the recombination frequency is near 50%, it suggests that the two genes are either on different chromosomes or on the same chromosome but very far apart. Therefore, choice D is the best answer. The other choices are less likely because if the genes were on different chromosomes, the recombination frequency would be close to 0%, and if the genes were very close together on the same chromosome, the recombination frequency would be close to 0% or 100%.

Recombination Frequencies near 50% Suggest That