Searching for articles about genetic testing can be as simple as running the following search -
"genetic testing" AND human AND ethics
OR
"gene therapy" AND human AND ethics
Once you've retrieved a set of articles, you can limit by scholarly journals, date, etc.
Articles that are not available full-text in any of our databases (don't forget to check Journal Finder) can be ordered through interlibrary loan, <http://www.mtaloy.edu/library/library-services/>.
Search ProQuest Central as well as PubMed Central. It would also be a good idea to search Ebook Central. If you've never used this database, review this resource guide <http://libguides.mtaloy.edu/ebookcentral>. Don't forget to ask a Librarian for assistance if you are having trouble locating resources.