AP Biology Immune Systems Part 3

Rh factor and Pregnancy

LUPUS

Rheumatoid Arthritis

Neuron

SCID

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.

Hypersensitive Immune Response