The detection of a fluorescent signal from one of the spots of a DNA micro-array indicate the gene that is expressed in a cell or tissue at a given moment.
Gene is a piece of DNA that has code for producing a particular product
DNA micro-array is the approach of identifying genes which involves thousands of genes or DNA fragments being attached to a solid surface also known as chip.
This chip is bathed in a sample of DNA or RNA isolated from study sample, due to complementary base pairing of the chip sample and the collected sample a fluorescence is produced which can be detected using special mechanism.
It is used to study gene expression and detecting DNA sequences.
To learn more about Gene here
https://brainly.com/question/8832859
#SPJ4
