Genetic Analysis of Single Nucleotide Variations in DNA from Whole Blood
This test examines specific changes (mutations) in your DNA sequence, which may be linked to certain genetic conditions or traits. It uses blood samples to identify variations in single nucleotide pairs.
["This test helps identify inherited genetic differences that could influence health risks or conditions."]
Key facts at a glance
- LOINC
- 103143-4
- Short code
- Genetic ds DNA+RNA anlyss Bld/T Ql
- Synonyms
- Genetic ds DNA+RNA anlyss Bld/T Ql
- Category
- chemistry
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- molgen
- Specimen volume
- 3 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
What This Test Measures
The test looks for single nucleotide polymorphisms (SNPs)—tiny differences in a single DNA building block (nucleotide)—across your blood-derived DNA. These changes may be associated with genetic predispositions to diseases, drug responses, or other health factors.
How the Test Works
Your blood sample is collected and processed to extract DNA. Advanced laboratory techniques analyze the DNA sequence for specific SNPs, comparing them against known reference sequences to detect variations.
Why It Might Be Ordered
A healthcare provider may recommend this test if you have a family history of genetic disorders, if you’re considering genetic counseling, or if symptoms suggest a genetic basis for your health concerns.
Preparation and Process
No special preparation is needed. You’ll provide a small blood sample, typically drawn by a healthcare professional. Results are usually available within 1–2 weeks, depending on laboratory processing times.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance
Short name
Genetic Testing for DNA Variants
Frequently asked questions
This test can help identify genetic risks for conditions like certain cancers, metabolic disorders, or cardiovascular diseases. It may also inform personalized treatment plans or guide preventive measures based on your genetic profile.
What does a positive result mean? A positive result indicates the presence of specific genetic variations, which may increase your risk for certain conditions. However, many genetic variations do not cause health issues and are common in the population.
Are there any risks or side effects from the blood draw? The blood draw itself involves a small risk of bruising, mild discomfort, or swelling at the site. Rarely, there may be allergic reactions to the blood collection process, but these are uncommon.
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy