Essential Genetics 6th Edition by Daniel Hartl

Exercise 19

Naturally occurring E. coli strains range in genome size from about 4 Mb to about 6 Mb, owing to the presence of genomic islands in some lineages but not in others. If a strain with a genome size of 5 Mb has a genetic map length of 100 minutes, what is the map length of a strain with a genome size of 4 Mb? Of a strain with a genome size of 6 Mb?