Genetic Testing

11 - 20 of 63 Answers

February 5, 2016: If the Y chromosome is passed down from father to son intact, then is it possible for say, an Italian to marry an Irish woman 10 generations back, with no other Italians marrying into the line maternally, and the 10th generation to still be identifiable as an Italian in their DNA? I read that you have 1/8 chance of not sharing DNA with a gr. gr. gr. grandparent, but what about the men and that Y chromosome?
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January 12, 2016: We recently got paternity results back saying that a child was my husband’s daughter. But it turns out that unknown to us when we did the testing, my husband’s brother could also have been the father. The testing company says that we need to have his brother tested to confirm that my husband is indeed the father but his brother refuses to get tested. What are our options?
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August 19, 2015: Can an X linked deficiency from a mother be avoided through PGD (Preimplantation Genetic Diagnosis)? 
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July 22, 2015: I recently found someone who might be my half-sister through 23andMe testing. Is there any way to tell if we share the same mom or dad? (I am male.)
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February 25, 2015: Can you tell someone's age from their DNA?
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February 13, 2015: My wife and I recently went to a fertility clinic and we are worried they may have implanted the wrong embryo. We both have an A blood type and our child has an AB blood type which I have read is impossible. How can we determine what is going on?
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October 8, 2014: I have heard that if a man matches at only 13 out of 15 markers on a paternity test, he can be ruled out as the dad. Is that true?
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July 9, 2014: My teammates and I are doing an interdisciplinary project on human genome mapping and we can’t seem to understand the method of human genome mapping.  How is a human genome mapping performed?
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May 7, 2014: I had a karyotype performed in the early 1980s to rule out Turner syndrome. How accurate were karyotypes done at that time? If I am having some issues with infertility should I have this test performed again?
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April 3, 2014: What do you think of the FDA shutting down the health part of 23andMe?
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