Genetic Testing

11 - 20 of 49 Answers

April 3, 2014: What do you think of the FDA shutting down the health part of 23andMe?
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December 18, 2013: Can first cousin DNA testing identify relatedness when more than two prospective living first cousins are available for testing? In my particular case all three individuals are male (I am one of them), the other two may be sons of my mother's sister and brother respectively.  I understand that testing between two first cousins is not very reliable and am wondering if having a 3rd increases reliability in any noticeable way.
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November 13, 2013: My aunt (50 years old) was recently diagnosed with aplastic anemia.  She comes from a family of eight children.  All seven of her siblings were tested to see who would be a bone marrow donor match.  One match was found, and some of the other siblings were matches with each other.  I am wondering what makes siblings donor matches with each other over other siblings.  I understand that it is in their genetic makeup and that they have a 25% chance of being a match with each sibling.  Please let me know if you can clarify for me what would make a closer match between some siblings than between others.
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August 22, 2013: How is DNA tested in people who died in accidents like a plane crash where their body is completely burnt? And who do they test their DNA against because they might be from different countries and far from the accident site? Is their DNA tested against/with their parents only?
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April 30, 2013: Is it worthwhile to get my own full genome done (since it’s only around $2000 these days)?
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February 8, 2013: I was reading about how they used DNA to identify the body of Richard III in England.  How could they use 600 year old DNA to identify him?
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December 19, 2012: Are there any good prenatal paternity tests out there?  I want something safe, reliable and easy to understand.
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September 5, 2012: In a DNA test that looks at relationships, do siblings match at all or half of their loci?
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May 23, 2012: How can you tell 2 different DNA samples apart from each other?
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January 25, 2012: My extended family just had 23andMe testing and a younger brother and older sister found out they probably aren't brother and sister. They are OK with this but we are trying to figure out how they are related. The results show they are 25% related except on the X chromosome where they share no DNA. Most likely given what we know about our family's history they are half brother and sister. Can you tell from this information if they share a mom or dad?
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