Mitochondria within human cells have their own DNA, but it is a relatively tiny genome encoding just thirteen proteins. Most of the genes required to make mitochondria are actually found in the nuclear genome of cells. What type of phenomenon is exemplified by this situation?

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This situation exemplifies coevolution leading to degeneracy in one of the symbionts, where mitochondria, originally independent organisms, have over time transferred most of their genes to the nuclear genome of the host cell, retaining only a minimal set necessary for their function. This process reflects a symbiotic relationship that has evolved over millions of years.

Mitochondria Within Human Cells Have Their Own DNA, but It