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Twin Zygosity DNA Testing
Initiate Test | Participants | Type of Samples | Procedure | How to Video | Understanding Results
Twin siblings By using our 

Twin Zygosity DNA Test

, twin siblings can be determined if they are fraternal or identical.

Click here to order your Free DNASwabTM DNA Collection Kit
You can also call our 

DNA Specialists

 at :

click here to contact us or
Call 800-DNA-EXAM (800-362-3926) to speak with a representative.

Identical Twins
Fraternal Twins
Special DNA Tests - Twin Zygosity DNA Testing

Identical twins occur when a single egg is fertilized with a single sperm and splits very early during development. Each division contains the exact same genetic potential.

The DNA profiles for identical twins will be identical. Additionally, the physical attributes of identical twins will seem similar for traits such as hair color, hair texture, eye color, height, and weight. They must also be of the same sex.

Fraternal Twins occur when two sperm fertilize two eggs. In this case, the amount of DNA in common between the twins is generally comparable to that of full siblings. Furthermore, if the two sperm cells originated from two different men, then the twins would represent half-siblings. Additionally, physical attributes may not be similar, and they also may not be of the same sex.

After testing the samples, a DNA profile for each twin will be established. If the profiles are different, then the twins are fraternal, and if the profiles are identical, then the twins are identical. Results are available within 5-7 business days after samples have reached our laboratory.

 Order Now  
$500.00 Twin Zygosity Test

Includes one set of DNASwabTM DNA sample collection kit and FREE delivery.

*Prices valid only in the USA
*Prices outside the USA vary by country
 Twin Zygosity DNA Test Summary  
The Steps are as follows:
1. Order DNA Test
Order a test online or call our DNA specialists at toll free 800-DNA-EXAM (800-362-3926) to request a FREE DNASwabTM 

DNA Sample Collection Kit

. Or, for legal purposes, arrange an appointment for DNA sample collection at a network facility nearest you.
2. Collect DNA Samples & Return
Samples are obtained using a buccal swab, then returned to our lab.
3. Receive Results
Results will be available within 5-7 business days, upon our receipt of all samples and will be mailed to the authorized designee(s).
*For detailed instructions, click here
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