10. Several Hfr strains are mated with an auxotrophic F- strain by the interrupted mating technigue. The order of transfer for the loci are given in the table.
strain 1 strain 2 strain 3 strain 4
thr str his thy
lip thy thy his
trp his str trp
his trp ilv lip
thy lip thr thr
What is the order of the loci on the chromosome?