Explain the process of replication of a retrovirus after it gains entry into the human body.

Explanation

### Step-by-Step Solution:

1. **Entry of Retrovirus**: The process begins when a retrovirus, which is an RNA virus, enters the human body. This can occur through various means, such as sexual contact, sharing needles, or from mother to child during childbirth.

2. **Reverse Transcription**: Once inside the host cell, the retrovirus uses an enzyme called reverse transcriptase to convert its RNA genome into DNA. This process is known as reverse transcription.

3. **Integration into Host DNA**: The newly synthesized viral DNA is then integrated into the host cell's genome. This is facilitated by another enzyme called integrase, which allows the viral DNA to become a permanent part of the host's DNA.

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