Answer:
2. The Fusion of cell membranes and transfer of single strand of plasmid DNA of donor cell.
Step-by-step explanation:
When one bacterium transfers its genetic material through direct contact to others. The bacterium transfers its genetic material called donor cell and one serves it called recipient cell.
There are mainly four steps in this process-
1. Connecting sex pilus to recipient cell by donor cell.
2. The Fusion of cell membranes and transfer of single strand of DNA to the recipient cell.
3. Each bacterium cell makes a complementary DNA strand.
4. Both bacterium cells separates.