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To the end consumer, DNA testing is reasonably straightforward; follow the instructions on the kit and let the service tell you about your genetics. However, advanced technologies power affordable at-home DNA testing, something that would have been impossible only a few decades ago. This guide will run through DNA testing 101:
The concept of genetics started over 150 years ago, with experiments on pea plants by Gregor Mendel. The field has evolved into a refined science with humongous strides, especially over the last two decades. The first human DNA test was completed in June 2000 at the cost of an estimated $150 million.
Let’s begin with an overview of what DNA is. DNA is…
Every cell in your body contains DNA. Those genes were copied in equal measure from each of your parents, but the combination of your genes is unique unless you are an identical twin. It’s the inheritance of DNA that results in some traits or disease being genetic. It’s also how you can trace your DNA backward and explore your ancestral roots.
|Goal||Trace Father’s Line||Trace Mother’s Line||Find Family|
|Test||Y-DNA test||mtDNA Test||Autosomal|
There isn’t a right or wrong type of person to undergo DNA testing.
Genetic testing is safe and it’s an option for anyone who wants to learn more about themselves regarding health or heritage.
However, before taking a DNA test, it’s important to understand the pros and cons of genetic testing and to fully understand what a test might reveal. For some, genetic testing opens a Pandora Box they would’ve been happier leaving sealed.
At-home DNA testing is fun and informative, so if you believe that learning about health risks or exploring ancestry could be painful or difficult for you, it’s probably better to forego testing.
DNA test kits vary from company to company, but most follow a general procedure:
How to Take an At-Home DNA test
You’ll want to research your options and narrow down the selection based on customer reviews and your personal needs. Most services let you order online and receive your test kit in the mail.
Once you receive the kit, it’s time for DNA collection. You’ll take a cheek swab or spit into a tube. Each kit comes with a set of instructions to follow for DNA collection and submitting your sample.
The testing lab extracts DNA from the cells you submitted and scans them for thousands of variations throughout your genome.
This final step makes it possible for you to learn more about yourself from the sample you submitted. The testing company will provide you with results based on medical research and its database of other samples. Depending on the test you used, you’ll gain access to information about your medical risks and your ancestral lineage.
We’ve compiled a list of dos and don’ts for anyone undergoing a DNA test:
It depends on whether you are talking about ancestry or health accuracy. In either case, there’s no easy answer. Let’s consider this question about accuracy based on your reason for taking a DNA test.
DNA testing is great for finding a closely related family member. Most tests can reveal first and second cousins or closer relatives who have taken the same test as you.
But modern-day tests fall short of revealing specific information about your ancestry and ethnicity if it goes beyond close relations. You won’t discover specific locations where your ancestors lived by taking a test but might find out the general region from which they lived.
For 23andMe to include genetic health reports, it underwent a lengthy FDA approval process. The company had to show its results could be reproduced 99% of the time in clinical labs.
Unfortunately, not all of the results are not immediately actionable or even understandable. 23andMe offers tutorials before allowing you to see health-related risks and predispositions, but that doesn’t mean you should base important health decisions on your results.
The best you can do is get general information from your results and discuss them with your doctor.
|Company||Database Size||Sales (est)|
|Ancestry.com||15 million||14 million units sold|
|23andMe||10 million||5 million|
|Family Tree DNA||1 million||Unknown|
|MyHeritage DNA||2.5 million||Unknown|
|National Geographic DNA||Unknown||Unknown|