The Most Trusted Name in DNA Testing

Over 3 Million DNA Tests Performed

mobile    location:
Twin Zygosity Testing Ireland

  1. FREE Peace of Mind Paternity Test Kit
  2. Legal Paternity Test
  3. Prenatal Paternity Tests
  4. AncestrybyDNA Test
  5. Immigration DNA Tests
  6. Cell Line Authentication
  7. Sibling Testing

  • ABO Blood Types can be used to calculate paternity?
    Learn More
  • Eye colour can be used to determine paternity?
    Learn More
  • Consent is require to test a person's DNA sample?
    Learn More
  • DNA can be used to help solve crimes?
    Learn More

Twin Zygosity DNA Test

DNA Diagnostics Centre’s Twin zygosity DNA testing will decisively resolve whether twin siblings are identical twins or fraternal twins. Parents of twins who purchase this test are often curious to know the if the children are identical or fraternal. Some perform the twin zygosity as a backup for potential medical emergencies, for example identical twins are ideal tissue and organs donors for each other.

Identical twins develop from a single zygote—the union of one egg cell and one sperm cell during conception. Because they come from a single zygote that splits during its early development, identical twins share the same DNA profile.

Fraternal twins develop from two zygotes—two egg cells that were fertilised by two sperm cells. Because they come from two zygotes, fraternal twins have different DNA profiles. Their profiles can be as different as any two non-twin siblings’ profiles can be.

Analyzing and comparing genetic profiles of twins, DDC can accurately clarify if they are identical or fraternal.

Further information can be viewed below on the twin zygosity testing service from DDC.

Who is tested?

How are samples collected?

What will the twin zygosity DNA test results tell you?

If you have any questions about twin zygosity DNA testing or require assistance, please call 01 506 0395.


Purchase a Twin Zygosity DNA Test

Twin zygosity DNA testing for peace of mind

Purchase a test using our online order form or by calling 01 506 0395.

Twin zygosity DNA testing for legal purposes

Require a legal test, please call us at 01 506 0395.


Paternity Explained   |    DNA Testing Services   |    Questions   |    About Us   |    Contact Us   |    Home   |    Sitemap     DNA testing  DNA testing