That’s a version of the “chimeric theory”, one of a few for the origin of eukaryotic organization: see Wikipedia’s article. The DNA of the host cell would have migrated into the encapsulated bacterium or archaeon, through processes that I’ll admit I’m a bit fuzzy on.
(Wikipedia links several papers in support of this theory; the only un-paywalled one I could find, however, is Margulis et al. 2000.)
Huh. I’ve skimmed this a few times and it’s pretty hard to understand… so they are saying that the nucleus ancestor was a fast swimming oxygen avoider, and it basically chose to avoid oxygen by hiding inside another cell like a hermit crab—and in exchange, pushing the “shell” cell around...and eventually fusing genomes with it?
I don’t know the answer to your question other than “they merged more fully than the genomes of other endosymbionts,” and in any case endosymbiosis is only one proposed explanation for the origin of the nucleus.
Wait, nuclei? Link?
Where’s the host’s DNA, then?
That’s a version of the “chimeric theory”, one of a few for the origin of eukaryotic organization: see Wikipedia’s article. The DNA of the host cell would have migrated into the encapsulated bacterium or archaeon, through processes that I’ll admit I’m a bit fuzzy on.
(Wikipedia links several papers in support of this theory; the only un-paywalled one I could find, however, is Margulis et al. 2000.)
Huh. I’ve skimmed this a few times and it’s pretty hard to understand… so they are saying that the nucleus ancestor was a fast swimming oxygen avoider, and it basically chose to avoid oxygen by hiding inside another cell like a hermit crab—and in exchange, pushing the “shell” cell around...and eventually fusing genomes with it?
Link to a review article
I don’t know the answer to your question other than “they merged more fully than the genomes of other endosymbionts,” and in any case endosymbiosis is only one proposed explanation for the origin of the nucleus.