There are different classes of animal viruses based on genetic material. These are as follows:DNA viruses have a group I and group IIRNA viruses have group III and group lV and group V RT viruses have groups VI and VII Group I and group II are under DNA viruses, They have deoxyribonucleic acid as genetic material.Group III, group IV, and group V under RNA viruses have ribonucleic acid as genetic material.Group Vl and group Vll are under reverse transcribing viruses and genetic material made of either DNA or RNA and replicate with the help of the reverse transcription process.