DNA undergoes .................but ....................usually does not.

Explanation

To answer the question "DNA undergoes .................but ....................usually does not," we need to identify the processes associated with DNA and RNA.

1. **Identify the process DNA undergoes**:
- DNA primarily undergoes a process called **replication**. This is the process where DNA makes a copy of itself, which is essential for cell division and the transmission of genetic information.

2. **Identify what usually does not occur with RNA**:
- In contrast, RNA does not typically undergo replication. Instead, RNA is synthesized from DNA through a process called **transcription**. Therefore, RNA is not replicated in the same way DNA is.

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