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) No; based on this data alone, the order could be X- Z- Y or Z- X- Y.
B) No; based on this data alone, the order could be Z- Y- X or X- Y- Z.
C) Yes; the order is Z- X- Y.
D) Yes; the order is X- Y- Z.
E) Yes; the order is X- Z- Y.

Question

Quizplus · Accepted Answer

The recombination frequencies alone do not provide enough information to definitively determine the order of the genes on the chromosome. The given percentages suggest that genes X and Y are farther apart than genes X and Z, but without information on the recombination frequency between Y and Z, it's impossible to determine the exact order. The genes could be in the order X-Z-Y or Z-X-Y, depending on the unknown recombination frequency between Y and Z.

If You Are Given a Recombination Frequency of 34% Between