Practice Problem 79 In this problem you will explore how to solve problems involving partial diploid lac operon bacterial strains. Bacterial strains that are “partially diploid” have two copies of the lac operon because they aquired a plasmid carrying just the lac operon region. One copy of the lac operon region is on the recipient’s bacterial chromosome, and the other copy is on the F plasmid that was introduced into the cell by conjugation. Partial diploid genotypes are written with the FT segment first and the recipient chromosome next. You create a lac operon partial diploid with this genotype: To determine which genes are transcribed and under what conditions, you need to first consider each genotype separately and then together.