DNA Twin Zygosity Test
DNA Twin Zygosity Test

Twin zygosity DNA testing from Paternity web – www.paternityweb.com can conclusively determine whether twin siblings are identical twins or fraternal twins. Twins and parents of twins often initiate this type of genetic test to satisfy their personal curiosity. Others initiate twin testing as a safeguard for possible future medical emergencies—identical twins are perfect organ and tissue donors for one another.By comparing the genetic profiles of twins, Paternity Web can definitively determine which type of twins they are.

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Twin Zygosity DNA Testing
Twin Zygosity DNA Testing
When twins are born, the physician usually is able to tell whether twins are identical or fraternal by examining the placenta. Identical twins usually share a placenta, while fraternal twins are usually in two different placentas. Sometimes records can be lost, the placentas might have been discarded or damaged before twin zygosity was determined, or doubt may arise because of the twins’ physical characteristics. In such cases, only a DNA test will be able to reveal the truth. A twin zygosity test compares the twins’ DNA profiles to see whether they match—an exact match proves that the twins are identical.
Types of Twins
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.
Twin Zygosity DNA Test Results
Twin Zygosity DNA Test Results
The results of a twin zygosity DNA test will reveal whether the tested twins are identical or fraternal. By comparing the twins’ DNA profiles, our laboratory can conclusively determine whether the siblings developed from one zygote (identical twins) or two zygotes (fraternal twins).
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