Across
- 2. A disease that jumps from animals to humans.
- 9. The city where the oldest known human HIV sample was found.
- 13. A widespread occurrence of an infectious disease in a community.
- 15. The change in genetic traits of a population over generations.
- 16. An animal host that sits between the original source and humans.
- 19. The individual "letters" (A, C, G, U/T) that make up DNA or RNA.
- 20. A random "typo" or change in the genetic code.
- 21. The organism that a virus lives inside of.
- 22. The complete set of genetic instructions for an organism.
Down
- 1. Using known dates (like old blood samples) to set a clock's speed.
- 3. The specific moment a virus enters a new host species.
- 4. The use of scientific tests or techniques to solve a crime.
- 5. The protein on a virus surface used to "unlock" human cells.
- 6. The process by which a virus makes copies of itself.
- 7. The process of two viral strains becoming more different over time.
- 8. A version of a virus with a specific set of new mutations.
- 10. The primate ancestor of the HIV virus.
- 11. To determine the exact order of "letters" in a genome.
- 12. The source of the original SIV-to-HIV spillover.
- 14. A direct line of descent or a specific branch on a viral tree.
- 17. The single-stranded genetic material used by HIV and SARS-CoV-2.
- 18. Abbreviation for the date of the very first common ancestor.