Speculations on the Origin and Evolution of Eukaryotism

Mechanisms of Gene Dispersal within Eukaryotic Ceils 

There are two types of modern cells. Anucleate cells, such as bacteria and blue-green algae, and nucleated, eukaryotic cells of higher organisms which contain mitochondria and sometimes plastids. 

If the cluster-clone pattern is spread out over a longer time period, stepwise development, first of the nucleus as the site of the genes and then the mitochondria and plastids, the latter could have originated as membrane-limited plasmids. 

what are some possible devices for intracellular gene dispersal And, secondly, what kinds of limits are imposed on the dispersal process why aren t all the genes for the organelle s ribosomes in the nuclear genome  

To simplify the discussion on gene transfer and protein and gene substitution, evolutionary possibilities starting only from the endosymbiont plan have been examined here, but gene transfer would be equally plausible 

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The results of the latter investigations, together with data from other systems, form the basis for the last part of this article, which speculates on the origin and evolution of eukaryotism and mechanisms of gene dispersal within eukaryotic cells. 

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