Should my immediate family have the same test?

Should my immediate family have the same test?

Alastair Greenshields (Principal) gives expert video advice on: How can the test tell where I'm from?; Would this suggest I am related to them?; How do I decipher the information? and more...

You wouldn't need to test every member of your family. Your DNA is a very good record, so it would come from your mother and your father. So, often, the DNA shared by your brother or your sisters is the same. So it's perfectly good enough to have tested by yourself, and to use those results as proxy for those as well. But then use those to compare with other people or to find out where that DNA is coming from.