The test has a defined purpose
A genetic test is designed around a specific question, such as a particular health-related genetic variant or an inherited condition.
Genetic testing explained
What is genetic testing, and what can it tell you?
Genetic testing examines selected genetic information to look for specific variations relevant to the purpose of the test. Depending on the analysis, a genetic test may provide information about a health-related genetic variant, inherited condition, predisposition, carrier status, pet disease risk, or another defined genetic question. The key is understanding exactly what the selected test examines—and what it does not.
Genetic testing is question-specific
A result only reflects the genes, variants, markers, or other
genetic information included in that particular analysis.
Simple definition
Genetic testing looks for defined genetic differences relevant to a specific question.
What does genetic testing mean?
Genetic testing uses laboratory analysis to examine DNA or other genetic information for variations associated with the purpose of a particular test.
In human health settings, genetic tests may be used to help confirm or rule out certain genetic conditions or provide information about the likelihood of developing or passing on particular genetic disorders. Other genetic tests can serve different purposes.
The phrase genetic testing therefore describes a broad field rather than one single test.
Genetic testing basics
Three ideas make genetic testing much easier to understand
These principles help explain why two genetic tests can use similar samples while producing completely different information.
Only selected information is analyzed
Ordering one genetic test does not mean every gene or every possible genetic condition is evaluated.
The report has boundaries
Results should be interpreted according to the scope of the actual analysis rather than treated as a complete assessment of health or future outcomes.
DNA testing vs. genetic testing
Are DNA testing and genetic testing the same thing?
The terms are often used together because many genetic tests examine DNA. In everyday language, there can be considerable overlap.
“DNA testing” is a broad phrase that can include health, ancestry, breed identification, identity-related analysis, and other DNA-based applications. “Genetic testing” is often used when the focus is on genes or genetic variations associated with a defined biological or health-related question.
- Both may involve analyzing DNA.
- The testing purpose determines what information is examined.
- A similar collection method does not mean two tests analyze the same thing.
- The report should be interpreted according to the selected test.
The name of the category matters less than the scope of the actual test.
Before ordering, look at exactly which genetic information is being evaluated and what question the result is intended to answer.
That is more useful than assuming every product described as “genetic” or “DNA” testing provides the same kind of information.
How genetic testing works
From sample collection to genetic report
The exact laboratory method depends on the test, but the customer journey can usually be understood through these four stages.
Choose the analysis
Begin with the specific genetic question you want the test to address.
Provide a sample
Follow the collection instructions for the selected test and submit the required sample.
Laboratory testing
The laboratory examines the genetic information relevant to the ordered analysis.
Receive the result
Findings are presented according to the genes, variants, markers, or other genetic characteristics included in the test.
Genetic test samples
How is a sample collected for genetic testing?
Genetic testing can use different biological samples depending on the analysis. Some DNAOM testing options are designed around straightforward, non-invasive home collection.
Regardless of the collection method, following the test-specific instructions matters because the laboratory needs a suitable sample for the selected analysis.
- Review preparation instructions before collecting.
- Use the sample method specified for the test.
- Avoid contamination during collection.
- Follow packaging and return instructions carefully.
Genetics in plain language
Common terms you may see on a genetic testing page
Understanding a few basic terms makes it easier to evaluate what a genetic test actually examines.
Gene
A gene is a segment of DNA with a biological function. Some tests examine particular genes because variations in those genes may be relevant to the testing question.
Genetic variant
A genetic variant is a difference in DNA sequence. Certain variants may have known relationships with inherited conditions, traits, or other biological characteristics.
Predisposition
A predisposition means genetic information may be associated with increased susceptibility or likelihood. It does not automatically mean a condition is present or will definitely occur.
Inherited condition
An inherited genetic condition can involve a genetic change passed through a family. The relevance of a particular variant depends on the condition and testing context.
Genetic health testing
DNAOM focuses on selected health-related genetic questions
Rather than presenting every possible genetic test, DNAOM keeps the health testing pathway focused on supported analyses with clearly defined purposes.
DNA methylation testing
Explore DNAOM's supported methylation testing pathway and review the individual test page for its exact scope, collection method, and report.
Explore methylation testingLactose intolerance genetic testing
This focused test looks at genetic information related to lactase production and genetic predisposition associated with lactose intolerance.
Explore lactose intolerance testingCeliac disease genetic testing
Review celiac-related genetic testing when your question concerns the genetic context associated with celiac disease.
Explore celiac genetic testing
Understanding results
What can genetic test results tell you?
A result can be useful only when it is understood within the limits of the genetic analysis that produced it.
A genetic test can provide
Information about the specific genes, genetic variants, hereditary conditions, predispositions, or other genetic characteristics included in the ordered analysis.
A genetic test does not automatically provide
A complete diagnosis, a guaranteed prediction of future health, or information about every genetic condition. Results should not be interpreted beyond the scope of the selected test.
Predisposition vs. diagnosis
A genetic predisposition is not the same as a diagnosis
Genetic variation can sometimes affect the likelihood or context of a particular condition, but health outcomes can involve many additional biological, environmental, and lifestyle factors.
A predisposition-related result should therefore be understood as genetic information within the scope of the test rather than a guaranteed prediction of what will happen.
- A variant may provide useful genetic context.
- Not every detected variant means a disease is present.
- Not detecting a tested variant does not rule out every possible cause.
- Health-related results may warrant discussion with an appropriate qualified professional.
Genetic risk and guaranteed outcome are not the same thing.
Genetics can contribute to health risk without being the only factor involved.
That distinction is particularly important when interpreting predisposition-focused genetic testing.
Genetic testing accuracy
How should you think about accuracy?
Genetic testing accuracy should be considered in relation to the actual analysis rather than reduced to one percentage that supposedly applies to every genetic test.
- Consider what genes or variants the test examines.
- Review the purpose and methodology of the analysis.
- Understand the importance of sample quality.
- Separate analytical findings from broader interpretation.
- Read the report within its stated limitations.
Genetic testing for pets
The same basic concept can apply to inherited pet genetics
Genetic testing is not limited to human health. DNAOM also includes approved dog and cat testing pathways for defined pet genetic questions.
Dog genetic testing
Canine genetic testing can serve different purposes. Disease-focused testing examines supported inherited genetic conditions, while breed identification has a different ancestry-focused purpose.
Cat genetic testing
Feline genetic testing can include broader inherited disease screening or a targeted test designed around a defined variant such as PKD1.
Before ordering
How do you choose an appropriate genetic test?
Do not start by asking which test has the largest report. Start by defining the genetic question you want the analysis to address.
Define your goal
Identify the specific health, inherited condition, breed, or other genetic question you want to investigate.
Review the testing scope
Confirm exactly what genes, markers, variants, conditions, or reference information the test includes.
Understand the practical details
Compare sample collection, laboratory turnaround, result format, accuracy context, and support after establishing the right test type.
Frequently asked questions
Common questions about genetic testing
What is genetic testing in simple terms?
Genetic testing examines selected genetic information for variations relevant to a specific question. The exact genes, variants, or markers analyzed depend on the test.
What can genetic testing tell you?
Depending on the analysis, testing may provide information about a particular genetic variant, inherited condition, predisposition, carrier status, or another defined genetic characteristic.
Is genetic testing the same as DNA testing?
The terms overlap because many genetic tests examine DNA. “DNA testing” is commonly used for a wider range of purposes, while “genetic testing” often emphasizes genes or variants relevant to a specific biological or health-related question.
Does a positive genetic result mean I have a disease?
Not necessarily. The meaning depends on the specific variant and test. A predisposition or risk-related result is different from a diagnosis and should be understood within the scope of the report.
Can genetic testing predict future health?
Genetic information may provide context about certain inherited risks or predispositions, but it cannot generally guarantee what will happen in the future. Health outcomes can involve genetics alongside many other factors.
How long do genetic test results take?
Turnaround depends on the specific test and laboratory workflow. Laboratory processing generally begins after a suitable sample is received. See how long DNA test results take for more information.
How do I choose the right genetic test?
Start with the genetic question you need answered, then compare testing scope, sample collection, report type, turnaround, and accuracy context. Avoid treating unrelated tests as interchangeable.
Health-related genetic testing has limits
Genetic information can be useful context, but an at-home test should not automatically be treated as a complete medical diagnosis or a guaranteed prediction of future health.
Continue learning
Helpful genetic and DNA testing guides
Ready to explore genetic testing?
Start with the genetic question you want the test to address.
Explore DNAOM's approved genetic health and pet DNA testing pathways, then review the individual test page for its exact scope, sample method, laboratory turnaround, and reporting information.