• Call Us @ 877-2DNA-LAB (236-2522)

News

  • Gobble, Gobble: GFI Lab will be closed Nov. 24 & Nov. 25 for the Thanksgiving Holiday. The lab will reopen Monday, Nov. 28.

DNA Testing Services

Popular DNA Testing Questions

Deals & Promotions

  • DNA5
  •  

What is Sibling DNA Testing?

When it's not possible to test the alleged father, it may be beneficial to compare the child with a sibling. Unlike a paternity test, two siblings don't always share DNA types in common when considering each marker tested. Each sibling should share half of their DNA in common, but it's not uncommon for two full siblings to not share a number (allele) in common at each genetic location. For a Sibling DNA Test, the comparison relies on the statistics to determine how likely they are related.

Because this is an AccuPlex41 DNA Test, no additional family members are required. Adding the mother, however, will strengthen the results.

Sibling DNA Test Details

Participants This test requires two siblings, where the gender does not matter. Including the mother and/or father is optional, but recommended when possible.
Home DNA Kits Make Your Own DNA Kit using cotton swabs (e.g. Q-Tips) and standard mailing envelopes. GFI DNA Collection Kit with Free Shipping for US Orders.
Payment We accept Paypal and all major credit cards (Visa, Mastercard, Discover, and American Express). For discrete payments, we suggest purchasing a pre-paid credit card available at most retailers.
Results Because siblings don't always share common alleles at each location, results from a Sibling DNA Test will determine how likely the two individuals are fully related, half related, or unrelated. In most cases, the two siblings know that they share the same mother and want to know if they share the same father. If the father is still alive and a sample can be obtained, it is strongly recommended that a sample be collected from him for comparison to the two siblings.
Case Studies If you're unsure about upgrading to an AccuPlex DNA test, please see our Sibling Case Studies from previous cases.

Order a Sibling DNA Test

* = Required Field
Which DNA Test Do You Need?
* What is the Case ID from the previous case? What's This?
* What is the Case Password from the previous case? What's This?
* What is the AccuPlexDNA from the previous case? What's This? Standard: 16 Marker Test ($50 per person)
AccuPlex26: 26 Marker Test ($100 per person)
AccuPlex41: 41 Marker Test ($150 per person)
* How many people will be tested? What's This? Alleged Father(s)
 Alleged Aunt(s)/Uncle(s)
 Alleged Grandparent(s)
 Alleged Sibling(s)
 Alleged Twin(s)
 Alleged Mother(s)
 Males(s)
 Item(s) of Evidence
 Reference Sample(s)
 Child(ren)
 I am including the mother's sample
 I am NOT including the mothers's sample.
 I am including the father's sample.
 I am NOT including the Father's sample
* Choose the AccuPlex DNA for this DNA test. What's This? This test is only offered as AccuPlex41. Standard 16 Marker Test ($50 person)
AccuPlex26 Upgrade ($100 person)
AccuPlex41 Upgrade ($150 person)
* How will you collect the DNA? What's This? Infidelity DNA Tests are Make Your Own DNA Kit only. Make Your Own DNA Kit
GFI DNA Collection Kit
* Will you submit, if any, non-standard sample(s)? What's This?
* Please choose a shipping method. What's This? US Standard: 5-7 days ($FREE)
US Express: 1-3 days ($25)
US Express + Return Shipping ($50)
International Shipping ($75)
Do you need rush processing? What's This? Yes ($250)
DNA Test:
Participants:
AccuPlex Upgrade:
Collection Method:
Collection Options:
Rush Processing:
DNA Name:
DNA Options:
DNA Totals:
Final Price:
You are here: Home » Dna Testing Services » Sibling Dna Test
 
DNA Tests
Company
Instructions
View the DNA Tests
GFI Lab

GFI Lab – 681 Main Street – Rockwood – PA 15557 – USA – © Copyright Gaskin Forensics, Inc. 2005-2011

GFI Lab is a DNA Testing Laboratory for Family Relationships. DNA Tests include Paternity, Sibling, Aunt / Uncle, Grandparent, and More!