Microarrays can be used to examine gene expression and also to conduct genome-wide association studies (GWAS). Which of the following are true about these microarrays? Please select all that apply.

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Microarrays are made by printing short pieces of DNA onto a surface. These printed features then hybridize to labeled nucleic acids during the array experiment. Features in expression arrays are sequences from genes. Features in GWAS arrays are polymorphic regions from across the whole genome. In expression arrays, mRNA is extracted and used for hybridization (sometimes after being converted into cDNA). Genomic DNA is used in GWAS arrays.

Microarrays Can Be Used to Examine Gene Expression and Also