A ' family tree ' can be drawn showing how men today descend from him .
All human men descend in the paternal line from a single man dubbed Y - chromosomal Adam , who lived probably between 200,000 and 400,000 years ago .
A ' family tree ' can be drawn showing how men today descend from man .
All human men descend in the paternal line from a single man dubbed Y - chromosomal Adam , who lived probably between 200,000 and 400,000 years ago .