If you are given a recombination frequency of 34% between genes X and Y and 27% between X and Z, can you predict the order of the three genes?
A)Yes; the order is X-Z-Y.
B)Yes; the order is X-Y-Z.
C)Yes; the order is Z-X-Y.
D)No; based on this data alone, the order could be Z-Y-X or X-Y-Z.
E)No; based on this data alone, the order could be X-Z-Y or Z-X-Y.

Question

Quizplus · Accepted Answer

Based on the recombination frequencies, it is clear that X is in the middle, as it has a lower recombination frequency with both Y and Z than the recombination frequency between Y and Z. However, we cannot determine if Z or Y is the gene that is farthest away from X. Therefore, the order could be X-Z-Y or Z-X-Y.

If You Are Given a Recombination Frequency of 34% Between