4 ms·
Eukaryotes don’t really evolve very much on the protein level - their complexity allows them to mostly evolve on the regulatory level (while bacteria often stil
by koeng 6y ago
Eukaryotes don’t really evolve very much on the protein level - their complexity allows them to mostly evolve on the regulatory level (while bacteria often still are on the protein level).
Practically, this means that getting proteins from elsewhere isn’t that selected for, while better regulation is. It’s a complicated subject, but that’s partially why there is so much “junk” dna in multicellular eukaryotes (single cellular like yeast are still pretty efficient)
- reubenswartz 6y agoMy primitive understanding is that the bottleneck for bacterial reproduction is DNA replication, so there’s a huge incentive to shed unneeded DNA, especially with mechanisms to get genes back via HGT. Am I right in thinking that the more efficient chromosome replication in eukaryotes doesn’t penalize junk dna the same way, so it can just stick around?