Conversation so far:
where are the proteins of the electron transport chain embedded
The electron transport chain is embedded in the inner membrane of the mitochondria. It consists of four large protein complexes, and two smaller mobile carrier proteins.
what type of dna does the mitochondrium contain
The mitochondrion has its own independent genome that shows substantial similarity to bacterial genomes.
why does the mitochondrion show substantial similarity to bacterial genomes
It is thought that mitochondria were once independent bacteria, and became part of the eukaryotic cells by being engulfed, a process called endosymbiosis.

Question: how is the dna inherited
Self-contained rewrite: how is mitochondrial dna inherited