Ancestry

1 - 8 of 8 Answers

November 18, 2016: I’ve heard that no one has the exact same DNA except for identical twins. But Ancestry.com DNA tests showed that my sister, mother, and I have the same DNA breakdown (100% Eastern European). My sister and I are not twins. What is the reason for this similarity? Should my other siblings take the test, too?
See Answer

September 27, 2016: I’ve heard that mitochondrial and Y chromosome DNA are useful for finding out whether two people are distantly related, but what makes these types of DNA better than regular DNA for learning about someone’s ancestry?
See Answer

September 20, 2016: I just had a DNA test done and it came back that my paternal Y-DNA was the rare haplogroup T.  Can you tell me more about the T haplogroup?
See Answer

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?
See Answer

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.)
See Answer

April 3, 2013: Hello, I did an African mtDNA ancestry test in hopes of pinpointing a tribe of my African lineage (that's what the company claimed they do). I'm an African-American woman. I received my results and it said that my lineage was of European descent, non-African. What does this mean? I was very confused because I'm clearly black as are my parents and grandparents before them.  Does that mean there is no African in me at all or that they just didn't find it? 
See Answer

April 18, 2012: About how far back can a standard genetic test trace family lineage and how accurate will the results be the further back they go? How good are they at telling how related two people are?
See Answer

November 23, 2010: How can some scientists determine that all humans were originally from Africa?
See Answer