I would need a better description of your research question and your data. As a start I would look at: https://www.amazon.com/Cancer-Diagnostics-Microarrays-Steen-Knudsen/dp/0471784079/ref=sr_1_1?keywords=Steen+Knudsen+Cancer+Diagnostics&qid=1574884464&s=books&sr=1-1 and https://www.google.com/search?q=Sample+size+calculations+in+Genomics&rlz=1C1CHBF_enUS874US874&oq=Sample+size+calculations+in+Genomics&aqs=chrome..69i57.35478j0j4&sourceid=chrome&ie=UTF-8 Best wishes, David Booth
You haven't indicated your inference statistic. Suppose it was sample mean then Google the name of the statistic eg: sample mean based sample size computation software This is what you get so just put in your statistic and Google away. For sample mean this is the result which has the appropriate instructions