Males can pass mitochondrial DNA!!!

Mitochondria have there own genome separated from the DNA in the cell's nucleus that controls every thing about you.

The mitochondria and their DNA should all come from your mother" they are from the original egg cell rather than the sperm" but that is apparently not the case for everyone.

Defects in mitochondria can lead to severe metabolic diseases so, doctors sometimes test the mitochondrial DNA in patients ... that's what doctors at Cincinnatia did for a 4 years old boy with suspected mitochondrial disorder.
They found that his mitochondrial DNA had abnormally high heteroplasmy ( genes from different source, both mother and father)
Doctors next tested the boy's family looking for the same abnormality, finding it in his mother , grandfather and two other great aunts.

The Cincinnati team reached out other facilities arond the world in search of other people with heteroplasmy in their mitochondria , they found two more un related families. Children in these families seem prone to get a mix of mitochondria at conception, and mothers moth the mix to their offspring, so even some one without a triggers for this condition could still end up with mixed mitochondria.

Scientists are currently unsure how parental mitochondria are getting into the cells , we just know that it's happening.
A fertilized egg cell should exterminate any parental mitochondria, but some people may carry a mutations that make that mechanism less effective.
Whatever the cause , it looks like a very rare occurrence , they said that the maternal mitochondrial DNA is still absolutely dominant.

Scientists unequivocally demonstrated the existence of biparental mitochondrial DNA heteroplasmy in the 3 un related multigeneration families.

Elucidation of the molecular mechanism by which this biparental transmission occur will expand our understanding of the process of mitochondrial inheritance and may provide an alternative approach to minimize the consequences of transmission of pathological maternal mitochondrial DNA on humans.