Chapter 7, Problem 7EQ

As mentioned in question 2 of More Genetic TIPS, origins of transfer can be located in many different locations, and their direction of transfer can be clockwise or counterclockwise. Let’s suppose a researcher conjugated six different Hfr strains that were $th{r}^{+}le{u}^{+}to{n}^{s}st{r}^{r}az{i}^{s}la{c}^{+}ga{l}^{+}pr{o}^{+}me{t}^{+}$ to an ${\text{F}}^{-}$ strain that was $th{r}^{-}le{u}^{-}to{n}^{r}st{r}^{s}az{i}^{r}la{c}^{-}ga{l}^{-}pr{o}^{-}me{t}^{-},$ and obtained the following results:

Strain	Order of Gene Transfer
1	$to{n}^{s}az{i}^{s}le{u}^{+}th{r}^{+}me{t}^{+}st{r}^{r}ga{l}^{+}la{c}^{+}pr{o}^{+}$
2	$le{u}^{+}az{i}^{s}to{n}^{s}pr{o}^{+}la{c}^{+}ga{l}^{+}st{r}^{r}me{t}^{+}th{r}^{+}$
3	$la{c}^{+}ga{l}^{+}st{r}^{r}me{t}^{+}th{r}^{+}le{u}^{+}az{i}^{s}to{n}^{s}pr{o}^{+}$
4	$le{u}^{+}th{r}^{+}me{t}^{+}st{r}^{r}ga{l}^{+}la{c}^{+}pr{o}^{+}to{n}^{s}az{i}^s$
5	$tonspro+lac+ga{l}^{+}st{r}^{r}me{t}^{+}th{r}^{+}le{u}^{+}az{i}^s$
6	$me{t}^{+}st{r}^{r}ga{l}^{+}la{c}^{+}pr{o}^{+}to{n}^{s}az{i}^{s}le{u}^{+}th{r}^{+}$

Draw a circular map of the E. coli chromosome that shows the locations and orientations of the origins of transfer in these six Hfr strains.