The GeneNetwork and WebQTL : PART 2  
link to www.genenetwork.org
lPart 1. How to study expression variation and genetic correlation (slides 2–17)
lPart 2. Discovering upstream modulators (slides 18–29)
RNA

Part 2: Discovering upstream modulators and quantitative trait loci (QTLs). A quantitative trait locus is a chromosomal region that harbors one or a few polymorphic gene loci that influence a trait. We are going to be looking for QTLs that modulate the steady state expression level of App in the adult mouse forebrain.