Assume that a certain bacterial chromosome has one origin of replication.
Under some conditions of rapid cell division, replication could start from the
origin before the preceding replication cycle is complete. How many replication
forks would be present under these conditions?
Each replication fork doubles as replication continues, so the initiation of replication would have 2 replication forks, but if replication began again before the cycle was complete, each of the original forks would produce 2 of its own replication forks, so there would be 2+2+2=6 replication forks.