Alzheimer’s disease (AD) is the most common neurodegenerat…

  Alzheimer’s disease (AD) is the most common neurodegenerative disorder. Researchers used hierarchical clustering techniques on RNASeq data to generate gene expression profiles across the temporal lobe (TL), frontal lobe(FL), parietal lobe (PL), and cerebellum (CB) brain regions of AD individuals (figure above).   Based on the data provided in the heatmap above, what general characteristic or shared patterns of the gene expression data is responsible for the grouping genes into Gene Set #1?