Illustration of how mutations define mt and Y chromosome haplogroups.
Original file is by <a href="//commons.wikimedia.org/wiki/User:Wobble" title="User:Wobble">Wobble</a>
from <a href="//commons.wikimedia.org/wiki/File:Molecular_lineage.gif" title="File:Molecular lineage.gif">File:Molecular lineage.gif</a>