Question

In a bacterial cross in which the donor (Hfr) is a+b+ and the recipient strain (F) is ab, it is expected that

recombinant bacteria ________.
A) will be a mixture of a+b+, ab, and ab+
B) will all remain ab
C) will all be a+b+
D) will be a mixture of a+b+, ab, a+b, and ab+
E) will be a mixture of a+b+ and ab

Answer 1

In a bacterial cross between an Hfr (donor) strain that is a+b+ and a recipient (F) strain that is ab, the expected recombinant bacteria will be a mixture of a+b+ and ab.

Step-by-step explanation:

In a bacterial cross between an Hfr (donor) strain that is a+b+ and a recipient (F) strain that is ab, the expected recombinant bacteria will be a mixture of a+b+ and ab.

This is because during conjugation, the Hfr cell transfers its chromosomal DNA to the recipient cell, which can result in the transfer of a+b+ genes as well as ab genes. Therefore, the recombinant bacteria will have a combination of both types of genes.