Conjugating	Cell Types Present after Conjugation
F+ × F−	Two F+ cells (F− cell becomes F+)
Hfr × F−	One Hfr cell and one F− (no change)*
F′ × F−	Two F′ cells (F− cell becomes F′)
*Rarely, the F− cell becomes F+ in an Hfr × F− conjugation if the entire chromosome is transferred during conjugation.