Y-chromosome DNA (Y-DNA): Y-DNA tests trace paternal lineage, as the Y chromosome is passed from father to son. It’s a precise method for exploring your paternal line but can only be taken by males.

The top genetic tests ... if your DNA matches with someone else. You'll have an opportunity to review all information before proceeding. Ancestry does not use the standard Y-chromosome and/or ...

Sex determination at birth is decided on the chromosomes the baby has. A female has two X chromosomes, whereas a male has one ...