During conjugation F-factor is commonly called as ……….

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Conjugation**: Conjugation is a process of sexual reproduction in bacteria where genetic material is transferred from one bacterium to another through direct physical contact.

2. **Role of F-factor**: During this process, the bacterium that donates its genetic material possesses a specific genetic element known as the F-factor.

3. **Definition of F-factor**: The F-factor is commonly referred to as the "fertility factor." It is essential for the process of conjugation as it enables the transfer of DNA.

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