<prompt> Microarray is -Study of multiple genesStudy of diseaseStudy of organismsStudy of blood group  <response>: Ans. is a i.e.. Study of multiple genes o Microarray is a hybridization of a nucleic acid sample to a very large set of oligonucleotide probes, which are attached to a solid support, to determine sequence or to detect variations in a gene sequence or expression or for gene mapping.o It has two major applications: gene expression analysisand genetic variation analysis. 