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Can a DNA test show whether twins are fraternal or identical?

April 26, 2017dna test fraternal identical twins

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Can a DNA test show whether twins are fraternal or identical?

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Yes. Only a DNA test can definitively show whether twins are fraternal or identical. This DNA test is called twin zygosity. We take DNA samples from the twins and test 16 locations on the DNA to create a DNA profile for each sibling. Identical twins will have exactly the same DNA profile.