do NOT keep amoeba as pets!

Some guests have the stomach to hide their pets there

Any idea the area based on the phone number?

Not American so not sure how your area codes work and I can’t remember the Ludacris tune about hoes in different area codes.

If that's how DNA worked, I imagine it just wouldn't pair, but that's not how DNA works. However there can be and are many mistakes in the transcription and translation of genes, they're called mutations and they're the mechanical cause of cancer. The kind of spontaneous mutation your imagining is unlikely to lead to cancer without other contributing factors, and the body has numerous control and correction mecahnisms, but there are billions of base pairs (i.e. A—T is one base pair) in each cell of the body getting transcribed and translated over and over and over, so quite a few mistakes get through.

Alas, it could never be

Yes, some viruses are single strand RNA (+ssRNA or -ssRNA) the textbook Microbiology: with Diseases by Taxonomy by Robert W Bauman is a good reference with a section for both. (Does have sqeemish pictures though.) (And its on zlib.)