In a generalized-transduction system using P1 phage, the donor
is ad+ met+ amps and the bacterial recipient is ad- met- ampr. The
donor allele ad+ is initially selected after transduction, and 50
ad+ transductants are then scored for the other alleles present.
Here are the results:
Genotype |
Number of colonies |
met+ ampr |
13 |
met+ amps |
24 |
met- ampr |
10 |
met- amps |
3 |
What is the cotransduction frequency for ad and
met?
What is the cotransduction frequency for ad and
amp?
Determine the order of the genes and draw the gene
map?