What is a Sibling DNA Test?
A sibling DNA test analyzes the genetic profiles of two or more individuals to determine if they are full siblings, half-siblings, or unrelated.
- Full Siblings: Share both biological parents (~50% DNA match).
- Half-Siblings: Share one biological parent (~25% DNA match).
- Unrelated Individuals: No significant genetic match.
👉 This test is often used when the alleged father or mother is unavailable for direct paternity or maternity testing.
Why Take a Sibling DNA Test?
- To confirm full or half-sibling relationships
- To indirectly prove paternity when the father is absent, deceased, or unwilling to participate
- For legal, immigration, or personal reasons
- To bring clarity in cases of family disputes or inheritance issues
How Does a Sibling DNA Test Work?
- Sample Collection – Usually a buccal swab (cheek swab) collected at home or in the lab.
- DNA Analysis – The DNA is tested across up to 46 genetic markers (50% more than standard 24-marker tests).
- Comparison – The alleles (DNA repeats) of the tested individuals are compared.
- Statistical Analysis – Advanced algorithms determine the probability of the tested relationship (full sibling, half-sibling, or unrelated).
Types of Sibling DNA Tests
- Full Sibling Test: Assumes one known parent and checks if both parents are shared.
- Half-Sibling Test: Assumes one parent is different and determines if one or no parent is shared.
Cost of Sibling DNA Test in India
- Price: ₹24,000
- Result Time: 10–12 working days
- Includes: Free home sample collection
Interpreting the Results
- Test results display allele numbers (genetic markers) inherited from each parent.
- These numbers are compared between the siblings.
- If enough genetic similarity exists, the test confirms full or half-sibling relationships with high accuracy.
How to Book a Sibling DNA Test in India?
Booking is simple:
- Call your nearest DNA Labs India center
- Or book online for free home sample collection
👉 DNA Labs India ensures accurate results with advanced testing across 46 genetic markers.
Key Takeaways
- Sibling DNA tests determine if two people share one or both biological parents.
- Useful when direct paternity or maternity testing is not possible.
- Cost in India: ₹24,000 with results in 10–12 working days.
- Reports are accurate, and confidential.
FAQ – Sibling DNA Test in India
Q1. What is a sibling DNA test used for?
It determines if two individuals are full siblings, half-siblings, or unrelated.
Q2. How accurate is a sibling DNA test?
With 46 marker testing, results are highly accurate and more reliable than standard 24-marker tests.
Q3. What is the cost of sibling DNA testing in India?
₹24,000 with free home sample collection.
Q4. How long does it take to get results?
10–12 working days. Results are sent to your registered email.
Q5. Can sibling DNA tests replace paternity tests?
Yes. When the alleged father is unavailable, sibling testing can indirectly confirm paternity.
