[Campbell Biology P.477] In a DNA microarray experiment, if normal tissue is labeled with a ... | Practice Question

In a DNA microarray experiment, if normal tissue is labeled with a green fluorescent dye and cancerous tissue with a red dye, which color spots would represent genes that are highly expressed only in cancerous tissue, making them of interest for cancer research?

  • A: Green spots, indicating genes expressed in normal tissue.
  • B: Yellow spots, indicating genes expressed equally in both tissues.
  • C: Red spots, indicating genes predominantly expressed in cancerous tissue.
  • D: No spots, indicating genes that are not expressed in either tissue.

Explanation

If cancerous tissue is labeled with a red dye, then genes predominantly expressed in cancerous tissue and thus of interest for cancer research would result in red spots on the microarray.