: Mitochondrial replication is controlled by nuclear genes and is specifically suited to make as many mitochondria as that particular cell needs at the time.

: Each human cell contains approximately 100 mitochondria

: The amount of mitochondria per cell also varies by cell type

: Egg cell: Mature metaphase II egg cells can contain 100,000 mitochondria

(so when it comes to passing down mitochondria to descendants, eukaryotes don't fool around)