After the DNAs attached to the glass slide of a microarray are exposed to a probe, how are they usually visualized?

Question

Quizplus · Accepted Answer

Fluorescent labeling is the most common method used to visualize the hybridization of cDNA probes to DNA on a microarray. This allows for quantitative analysis of gene expression levels on the array. Radioactive labeling is less commonly used due to safety concerns, and ferritin labeling is not typically used in microarrays. mRNA probes can be used in microarrays, but they would still need to be labeled with a fluorescent dye for visualization.

After the DNAs Attached to the Glass Slide of a Microarray