Is there such a thing as genealogy tests?

[LouLou]

If so:

Does it work? Is it beneficial? Does it hurt? How do they test you? Where do you get the test done? How long till you get the results? Is it detrimental to your health to get tested? Is it safe?
How much does it cost? With genealogy tests, do you find out exactly who's descendants you are, can you trace it back like all the way to before 10,000 BC?
Sources will be helpful. Reliable, easy to understand, correct, and up to date sources.

[Violet]

This question was asked only a few minutes ago by someone asking practically exactly the same statements and questions as you. Seems suspiciously like the same person is using a different account. However, the answer is the same........

Not exactly. DNA tests in genealogy will tell you generally the geographic origins of your ancestors based on having DNA that is common in certain populations of people in certain areas of the world. But it will NOT tell you who your ancestors are. They do not have DNA samples from everyone that ever lived, or hardly anyone that lived more than a few decades ago. You are not going to find out by DNA testing if King so and so from 1492 AD is your 18th great-grandfather.

EDIT: Very intersting. This question was asked a few minutes ago by someone named Brianna, and this user Lou Lou answered it; yet turns around and practically re-asked the same question. Seems like someone is playing with multiple accounts which violates Yahoo rules. Both have been reported so Yahoo can figure out what is what with this.

[Máiréad]

The closest thing to this is to participate in the genealogy project that National Geographic is currently working on. You purchase a 100 dollar kit, follow the instructions, send in the samples and what they will be able to tell you is what particular line your ancestors and you yourself descend from. Look up the info in the national geographic website. Other sites like genealogy.com can help you some as well, but without actual dna testing of your supposed relatives as well as yours, it would be kind of hard to pinpoint that easily.