Final answer:
During bacterial conjugation, the donor cell can transfer genetic material, but usually only a few genes are transferred before the process stops. This is due to the transient nature of conjugation and the large size of the bacterial chromosome.
Step-by-step explanation:
In bacterial conjugation, the donor cell can transfer genetic material, usually in the form of a plasmid, to the recipient cell. However, the transfer usually stops before a complete copy of all the donor's DNA is transferred. This is because the process of conjugation is temporary, and the contact between the cells is transient. Additionally, the size of the bacterial chromosome makes it impractical to transfer the entire chromosome. Only a few bacterial genes are transferred before the process is halted.