The eukaryotic genome is comprised entirely of genes derived from Archean ancestors.

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While there may be some genes in eukaryotes that were derived from Archean ancestors, the majority of the eukaryotic genome is believed to have arisen through a process of endosymbiosis, in which prokaryotic cells were engulfed by larger eukaryotic host cells, eventually giving rise to mitochondria and chloroplasts. Additionally, eukaryotic genomes have undergone significant changes and expansions through various mechanisms such as gene duplication, gene loss, and horizontal gene transfer.

The Eukaryotic Genome Is Comprised Entirely of Genes Derived from Archean