（When the host cell divides, copies of the recombinant DNA molecule are passed to the progeny and further vector replication takes place.
（When the host cell divides, copies of the recombinant DNA molecule are passed to the progeny and further vector replication takes place.
当宿主细胞分裂时，重组DNA分子的拷贝随之进入下一代细胞，同时也产生载体效应。