1. AP Biology
Immune Systems
Part 3

3. Rh factor and Pregnancy

4. LUPUS

5. Rheumatoid Arthritis

6. Neuron

7. SCID

8. Gene-to-gene recognition
No Avr allele;
virulent pathogen
R allele; plant cell
becomes diseased
Avr allele
Avr allele;
virulent pathogen
No R allele; plant cell
becomes diseased
No Avr allele;
virulent pathogen
No R allele; plant cell
becomes diseased
If there is no gene-for-gene recognition because of one of the above three conditions, the pathogen will be virulent, causing disease to develop.

9. Hypersensitive Immune Response