This is the DNA found in the nucleus of the cell and makes up are chromosomes. This is the DNA that is inherited from our parents. We get half from our mother and half from our father. This is the DNA that serves as a blueprint for human beings and codes for are physical and mental traits. Mt DNA, on the other hand is not found in the nucleus of the cell, but is instead found in a portion of the cell called mitochondria.
Mitochondria are a part of the cell that is responsible for energy production.
There are no mitochondria found in sperm heads, so the mitochondria and its DNA are solely inherited from our mother. A persons mtDNA then should be the same as that persons mother, siblings, or any maternal relative. Also, each cell has one nucleus, but have several thousand mitochondria. Thus mtDNA is found in abundance in most cells. Nuclear DNA is made up of 3,000,000,000 base pairs, mtDNA is about 16,500 base pairs.