DNA: What type of test is ancestry?

DNA Ancestry DNA is an autosomal home DNA Kit. 

We like to say, just SPIT and SEND.  But to use it as a genealogical tool, you must test the right person.  Follow this rule of thumb:

Two things to consider if you wish to use DNA as a genealogical tool. 

1) autosomal tests are reliable for about 5 generations, so you will want to test the eldest family members.

2) if on a budget consider both the health of family members and actuary tables . 

Harvard Health Publishing, Harvard Medical School,
Why men often die earlier than women, 22 Jun 2020

Remember we are talking "rule of thumb." But, this is why many start with the men in the family.

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From Tracing Ancestors