A cell's like a chicken egg. The white is where the mitochondrial DNA is. And it's unchanged down the female side. [I think I'm right] Mr Jones is your Dad: and the former Miss Smith your Mom. You are 50% Jones,and 50% Smith. And share Smith's DNA yOUR GRANDPARENTS WERE JONES m Black and Smith m White You are 25% Jones,Black,Smith,and White, and share White's DNA aND YOU INHERIT from each Your great grandparents wer Jones m Red, and Black m Blue and Smith m Gray, and White m Pink. You are 12 1\2% from each,and share Pink's mitochondrial DNA You can inherit from each. Too many genealogists ,and it's natural, are only interested in tracing Jones, or Jones and Smith. Names you knew as a kid. Heart researchers define someone as genitic for heart illness, if their parents,or their grandparents have had a heart attact,or a stroke, by 55 years old. I had mine while nursing my Dad[ Jones,] who was 96,and my Mom [Smith] who was 92. But I was classed as "genetic",because my Dad's mother [ Black] had a major stroke before 55 years. Her side seems to have passed diabetis from her grandfather, and father, and my eldest uncle,and his kids. ________________________________________________________________ GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/tagj.