Original: Reverse transcribing viruses with RNA genomes (retroviruses), use a DNA intermediate to replicate, whereas those with DNA genomes (pararetroviruses) use an RNA intermediate during genome replication.
Simplified: ; Reverse transcribing viruses: Reverse transcribing viruses with RNA genomes (retroviruses) use a DNA intermediate to replicate. Those with DNA genomes (pararetroviruses) use an RNA intermediate during genome replication.