Friday 29 Y for Y DNA.
Y DNA is carried by the males and is therefore passed, father to son. The Y chromosome is one of the two sex chromosomes; the other is the X chromosome. Males have both the X and Y chromosomes, women have two X chromosomes. Blaine T Bettinger has a book ‘ The Family Tree Guide to DNA Testing and Genetic Genealogy,’ that explains this a whole lot better than I can. I’m still learning the DNA side of genealogy