Diagram showing sex-linked mitochondrial inheritance.
Original image: National Institutes of Health. Vectorisation: <a href="//commons.wikimedia.org/wiki/User:Marnanel" title="User:Marnanel">User:Marnanel</a>
Vectorised version of <a href="//commons.wikimedia.org/wiki/File:Mitochondrial.jpg" title="File:Mitochondrial.jpg">File:Mitochondrial.jpg</a> which is in the public domain.