More DNA Tests

DNA Testing for Twins

Twin DNA Testing helps many parents learn whether their twins are identical. Many people assume twins are identical, especially as the twins grow older and appear to share physical traits such as hair color, eye color, or height and weight. But whether or not twins are identical can be difficult to determine just by looking, especially with younger twins who are infants or toddlers. 

DNA Testing for Twins determines whether two siblings are identical or fraternal twins. Genetic profiles (DNA results) for identical twins match exactly; fraternal twins have different DNA profiles. 

Identical Twins

Identical Twins share identical DNA profiles. The physical attributes of identical twins appear to be the same for traits such as hair color, hair texture, eye color, height, and weight. They must also be of the same sex.

Fraternal Twins

Fraternal Twins have unique and different DNA profiles; their biological relationship is similar to full-siblings that are born at different times. The physical attributes of fraternal twins can be very different—they may even be different genders. However, some fraternal twins appear to have the same traits such as hair color, hair texture, eye color, height, and weight.

An IDENTIGENE DNA Test for Twins can answer the question with 100% certainty.

How to Get a Twin DNA Test (Identical vs. Fraternal)

1. Purchase your kit by calling 1-888-404-GENE (1-888-404-4363).

Test kits sold at the drugstore are intended for paternity testing only. If you purchased a kit at the store, we will apply the cost of your kit toward the final price of your Twin DNA test.

2. Test at home or via one of our collection sites.

For at-home, private testing, IDENTIGENE will send you collection materials. We will arrange for your collection appointment (and send a legal DNA test collection kit directly to the collection site) when testing for legal purposes (such as immigration or child support).

3. Collect samples using simple cheek swabs.

Use the kit as directed and, with the safe and simple cheek swabs included in the kit, collect samples from the each of the twins.

4. Mail your samples to IDENTIGENE.

Use the postage paid return mailer provided in the kit. (For legal-purpose DNA tests, the collector will ship DNA samples directly to IDENTIGENE maintaining a documented chain-of-custody.)

Access results online in just 10 working days from the time your samples arrive at the laboratory. IDENTIGENE Twin DNA Tests are 100% accurate with conclusive results.

If you have any questions about DNA Testing for Twins or other DNA Testing, please contact us (Monday through Friday, 9 AM to 6 PM ET).