In my case my Grandmother was from Nicaragua, a place with a great deal of ethnic mixing. Most Nicaraguans are either more than half European, Native American, or African. I believe my Grandmother was a little more than half European. She was probably around a quarter Native American, based on my Mom's DNA results at AncestryDNA. I've been finding the X data at 23andMe to be informative regarding the ethnic mix on our maternal grandmother's side. I'm also beginning to understand the way the X recombines, or doesn't. Sounds like the X is more resistant to recombining than the other chromosomes. So it's possible that an unrecombined X could be passed on, as may be the case with a male cousin, and myself. I looked at the X sharing chromosome inheritance charts. I assumed that I could have inherited X DNA from most of the close lines. Looking at my X DNA I see that I didn't inherit DNA on the X from all close ancestors who could have contributed to my X. Instead I received a majority of the DNA on my X from my maternal Great-Grandmother and Great-Grandfather, based on the Native American, very little if any from anyone else. At least I'm unaware of my Maternal Grandfather having any Native American blood? I plan on testing my Mom to get a better idea of exactly who contributed the most to my X. If my chromosome is completely Native American and Southern European I may have gotten an entire X chromosome from my Nicaraguan Grandmother.
|My X chromosomes. Orange is Native American, Purple African, Blue European.|
|Orange is Native American, Purple African, Blue European. Brother and younger and sister|
|This is from Family Traits Browser at 23andMe|
Showing full identical dark Blue and half identical light blue
Here is a chart Dr. Kathy Johnson made for us.
|Chart shows my 2 female and one male cousins ethnicity results|
From Family Traits and the Ancestry Composition chromosome views 23andMe