Race, Ancestry, and Relatedness
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April 2, 2019:
I learned through 23andMe that I have a half-sister. However, my father was an identical twin, so this woman also matches with my cousin as a half-sister. Both twins are deceased. Is it possible to solve the mystery of which twin is actually her father?
February 19, 2019:
I have two half-siblings and share DNA with one at 28.7% and the other at 24.6%, which I assume is normal. However, according to the 23andMe, the brother sharing the most DNA shares only 47 segments versus 55 segments with the other brother. Is this also considered normal?
November 29, 2018: How exactly do paternity tests work?
January 8, 2018:
What is the best genetic test for telling whether my brother is a full or half-brother?
November 9, 2017:
My husband just learned who his birth parents are. Unfortunately both are deceased. The birth father’s family wants my husband and the last surviving sibling (an aunt) to be tested to make sure the birth mother named the right guy! I understand the test they need is called an avuncular test. Is there a specific type of lab that we can use to make sure they are testing enough and properly to try to achieve the most conclusive result, whichever way that goes? There are so many types of labs on the web...
August 24, 2017:
My sister and I did ancestry.com and she was put into a genetic community and I was not. Does this mean we are not as closely related as we think?
August 2, 2017:
My brother and I recently used the DNA testing company MyHeritage and the results said we shared 38% of our DNA. We are confused because we thought full siblings shared 50% and half siblings shared 25% of their DNA. Why are we right in the middle?
May 17, 2017:
My twins each did a 23andMe DNA test and the results verified that they are identical; however, their ancestry composition is not!
How is that possible if their genomes are identical?
April 13, 2017:
My sister and I had our DNA tested. We were raised with the same mother and same father - both are deceased. There has been talk in the family that we have different fathers.
Our ancestry test came back similar; however, we are not sure how much difference there should be in the percentages. For example: I am 50% Great Britain my sister is 39%, I am 10% Scandinavia my sister is 28% and other differences are 1 - 3%
January 31, 2017:
My ethnicity results state I’m 51% Italian. Would both of my parents need to be Italian? If neither parents are 100%?
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