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A Twin Zygosity DNA Test determines if twins are identical or not. Twin siblings can either be 'identical' or 'fraternal'.
Knowing whether twins are identical or fraternal is often difficult. Appearance alone often is not a reliable method in determining twin type because identical twins do not always look exactly the same, and fraternal twins can sometimes look very similar, leading to confusion about exactly what type of twins they are. Sometimes, twins grow up never knowing for sure whether they are identical.
Identical Twins
When one egg is fertilized by one sperm cell, and then divides and separates, two identical cells will result. These cells will then develop into identical twins.
Fraternal Twins
When two eggs are independently fertilized by two different sperm cells, fraternal twins result. The DNA profiles for fraternal twins will not be identical, and they are just like full-siblings that are born at different times.
There are many possible reasons to have a Twin Zygosity Test. Some examples include:
Curiosity testing: Parents of twins and twins themselves may wish to know whether they are identical or non-identical.
Medical necessity: In medical situations requiring blood transfusions and organ transplantation, an identical twin can help save the second twin's life. Knowing twin zygosity beforehand is thus beneficial for timely action in these occurrences.
Medical research: Twin studies have provided valuable information to the research community. Twin studies help to examine the contribution of environmental and genetic factors in the study of ageing, the study of genetic diseases.
The sample collection is a simple and painless procedure, using a mouth swab to wipe off a specimen of saliva and cheek cells from the twins mouth. Please refer to our DNA Sample Collection Procedure page for visual instructions on how to take the samples.
At easyDNA the samples are analysed with our state-of-the-art genetic identification system using 16 different genetic markers. The results guarantee minimum probabilities in excess of 99.99%. Results are available within 5 to 7 working days after arrival of the samples at our labs.
A Twin Zygosity Test from easyDNA costs SEK1995 for two siblings to be tested. The cost for additional siblings (for triplets, quadruplets, etc.) is SEK955 per person.
Our Express Service option allows your DNA samples to be processed within 48 Hours from receipt of samples at our laboratory. For the additional service express fee you will have your results emailed to you within 48 Hours. This service is offered to all DNA tests including Relationship Testing. This service is not applicable to non-standard samples such as hair, clothing and cigarette butts.
For further information please e-mail us at info@easydna.se
Related article for more information : Twin Zygosity DNA Testing
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