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I am new to this. I have an SNP array composed of digits [0,1,2] for chromosome 21. How do I find the start:end locations for the region that is "21q22.11" step by step?

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  • $\begingroup$ It seems your title doesn't really match to the content of your question, could you fix that? $\endgroup$ Jan 17 '20 at 9:13
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You first need to get the coordinates of the "cytoband" 21q22.11, which I would search for using the UCSC table browser. You need the following settings: Clade: Mammal genome: Human assembly: group: Mapping and Sequencing track: Chromosome Band table: cytoBand region: position chr21 output format: BED

(you can leave other options as default)

That will give you a bed file of cytobands on chr21. You'll need to search (e.g. grep) for your cytoband: q22.11.

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