1. EVOLUTIONARY ANALYSIS 1. To show the kind of questions evolutionary biologist investigate. 2. Demonstrate how an evolutionary view can inform researchers. 3. Introduce new concepts.

2. Evolution of HIV Human Immunodeficiency viruses HIV-1 HIV-2 These are the pathogens that cause the acquired immune deficiency syndrome (AIDS)

3. HIV- HUMAN IMMUNODEFICIENCY VIRUS HIV is a compelling case study because it raises issues that influence the lives of everyone. HIV is a virus that rapidly evolves drug resistance. HIV exemplifies two of the most pressing public health issues of our time.the

4. DEFINITIONS Evolution- 1. Descent of organisms from common ancestors 2. With the genetic and phenotypic changes over time 3. These changes make them more suited to the local environment.

5. Allele- 1. Alternative forms of a gene 2. Found at the same point on homologous chromosomes.

6. Questions 1. Why have promising AIDS treatments, like AZT, proven ineffective in the long run? 2. How does HIV win its battle against the immune system? 3. Why does HIV kill people? 4. Where did HIV come from?