Tag Archives: exon

Would you like to help?

I have been getting lots of favorable comments on my blogs recently and I will go out on a limb by assuming the majority of them are “real”. Please understand I am an old school baby boomer who has a … Continue reading

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Evidence for hierarchical endosymbiosis

In this blog, there are numerous references regarding hierarchical endosymbiosis. Simply put, this phrase means that cells swallowed smaller cells that were, in turn,  swallowed by larger cells and so forth. Not only did this swallowing happen, but the genetic material of … Continue reading

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Could our DNA have evolved from simple viruses?

In this blog, I discuss the evolution of complex organisms from more primitive ancestors. When I do this, I go way, way, way back in time.. before mammals, dinosaurs, fish, simple sponges, one celled protozoa, and even before the first … Continue reading

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Are textbook depictions of our chromosomes accurate?

In probably every textbook illustration you can find on human chromosome structure, there is always the same recurring theme: They are depicted as simple, linear strands of DNA wound up much like garden hoses or balls of twine.  However, you … Continue reading

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Are cancers new species?

There is a very interesting article suggesting that cancers may actually be new species.  In this study, chromosomal probes specific for each chromosome in a human cell are matched against chromosomes found in human cancers.  In Figure 8 of this … Continue reading

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Cellular differentiation and endosymbiosis revisited

In an earlier post on this page I discussed evidence that the eukaryotic nucleus is compartmentalized and how this compartmentalization may allow one compartment to become irreversibly differentiated through DNA rearrangements and deletions while leaving the remaining compartments untouched. I … Continue reading

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Could multicellularity in animals have been the result of endosymbiotic “fungi”?

It has been known for some time that fungi are more closely related to animals than to plants (ref, 1997).  The split from plants occurred one billion years ago and 35 million years later the fungi and animals parted company…or … Continue reading

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