After FF cross a recipient bacterium is The frequency of tr

After F+×F cross, a recipient bacterium is ______. The frequency of transfer is relatively __________ .

After Hfr×F, a recipient bacterium is _________ . The frequency of transfer is relatively __________ .

Here is an incorrect attempt:

Hfr low high After F+ x F cross, a recipient bacterium is After HfrxF a recipient bacterium is Reset Help The frequency of transfer is relatively The frequency of transfer is relatively

Solution

1. Hfr cells: Higher recombination frequency; F factor is integrated into the bacterial chromosome, behave as F⁺ cells forming sex pili and undergoing conjugation with F^- cells, only allows recombination usually doesn\'t result in F^-. SO the correct answer in the blanks are Hfr and high.

2. F^\' cell: F factor has excised form the bacterial chromosome and taken a small amount of the bacterial chromosome with it, these bacterial chromosome genes are carried with F plasmid. The correct answer in the blanks are F^\' and high.