A conjugation experiment is carried out between F+ his+ leu+ thr+ pro+ bacteria and F- his- leu- thr- pro- bacteria for a period of 25 minutes. At this time the mating is stopped, and the genotypes of the recipient F- bacteria are determined. The results are shown below:
|
Genotype |
Number of colonies |
|
His+ |
0 |
|
Leu+ |
13 |
|
Thr+ |
26 |
|
Pro+ |
6 |
What is the probable order of these genes on the bacterial chromosome?
1
thr, leu, pro, his
2
pro, leu, thr and the position of his cannot be determined
3
thr, leu, pro, and the position of his cannot be determined.
4
his, pro, leu, thr