Genetics and Genomics

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Organelle DNA in Eukaryotes


Eukaryotic cells are believed to have evolved from prokaryotic cells through a symbiosis between separate single-celled organisms.

According to the endosymbiotic theory,

and plastids such as

are organelles representing formerly free-living bacteria (prokaryotes) that were taken inside another cell as an endosymbiont around 1.5 billion years ago.

These organelles carry DNA that is

the remainder of the eukaryotic cell.