Gene interactions: Collecting gene expression data
All cells of a multicellular organism have the same set of
genes. What accounts for the differences in various cell
types and function is which of the genes are being
expressed (switched on) at a given time in a given cell.
A relatively new technology, called gene chips or
microarrays makes it possible to monitor, for tens of
thousands of genes simultaneously, the differences in gene
expression levels between two different experimental