African American DNA Research Forum
Need Help Understanding
I've been doing some preliminary reading on DNA testing for genealogical purposes. I read an article that stated that the Y chromosome mutates more often than the X chromosome (that the X chromosome stays virtually unchanged from generation to generation).
First point of clarification: If this is so, how does this affect one when using a cousin to test a male line?
Okay. I have a line that I would love to use DNA to help with. This would be my great grandfather's line. He and my great grandmother had three children (all of whom are dead). I have three male cousins that descend from my great grandfather (he was actually their grandfather). If I am reading and understanding correctly, they can be tested and receive information based on the Y chromosome they received from their father (son of my great grandfather) and this information would be relevant and hopefully helpful to the rest of the family as well--correct or incorrect?
I know this may sound silly, I am just in need of some layman's terms clarification on this one.
Thanks for any help.