Final answer:
If conjugation was allowed to proceed for 100 minutes for an Hfr strain of E. coli, then it is theoretically possible for the entire genome (100%) to be transferred. However, this scenario is uncommon because conjugation is typically transient and the entire chromosome is rarely transferred fully.
Step-by-step explanation:
If we are mapping bacterial genes by allowing conjugation to proceed for 100 minutes, we need to refer to the approximate time it takes for the entire genome of an Hfr strain of E. coli to be transferred through conjugation, which is also roughly 100 minutes. However, it's important to note that the contact between bacterial cells during conjugation is usually transient and the entire chromosome is rarely transferred. Considering that, if conjugation were to be allowed for exactly 100 minutes, it is theoretically possible for the entire genome to be transferred, given that no interruptions occur. So, the answer in this context would be e. 100%. However, the complete transfer is unusual due to the transient nature of conjugation.