Idk the options but it could be genetic variation
DNA microarray assays allow scientists to identify networks of gene expression across an entire genome.
The microarray is scanned to determine the expression of each gene printed on the slide after hybridization. The associated spot on the microarray turns red if a particular gene's expression is higher in the experimental sample than in the reference sample.
The DNA microarray is a technology that is used to identify whether a specific person's DNA has mutations in genes like BRCA1 and BRCA2. The chip is made up of a tiny glass plate that is enclosed in plastic. A few businesses use techniques resembling those employed to create computer microchips to produce microarrays.
Learn more about DNA microarrays here: brainly.com/question/14728534
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This is the excretory system
