What Is Twin Zygosity Testing?

About a quarter to one third of the time identical twins will develop in separate membranes so sometimes identical twins can be misclassified as fraternal if the doctor sees only one membrane. This is why twin zygosity DNA testing is a good thing to have done if you want confirmation backed up by laboratory testing.

The DNA test done to determine if the twins are identical must show every single marker to be exactly the same.

How Private Is Your Dna Information?

Giving insurance databanks information about your genetic information is also something to be cautious of. They could possibly cause denial of insurance if they found information on genetic pre-dispositions or if they tested your DNA for other health issues and found something they didn't like.

You may not even be aware that if you take a DNA test that your personal information will be sold or shared with other agencies.